[{"name":"Kamel et al. 2009 (Group 2)","type":"Standard","authors":["I. Kamel","A. Gadalla","H. Ghanem","M. Oraby"],"sources":["https://www.sciencedirect.com/science/article/abs/pii/S1743609515326229?via%3Dihub"],"selfreported":false,"countries":["Egypt"],"methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":"Yes","erectile_dysfunction":"Yes"},"datasets":null,"year":"2009","notes":"Group II andrology patients complaining of organic ED, proved by intracavernosal injection and penile duplex. (age mean: 47.7yrs, range: 17-72yrs), Mean duration of ED 3yrs. ED correlates with decreased BPSL.\n\nNOTE: Flaccid Girth is actually Stretched Flaccid Girth.","last_modified":"2026-04-26T22:44:27.956Z","draft":false,"id":"kamel2009group2","data":{"flaccid_girth":{"mean":8.8,"sd":0.8,"sample":78},"flaccid_stretched_bp":{"mean":11.2,"sd":1.5,"sample":78}}},{"name":"Yuruk et al. 2015","type":"Standard","authors":["E Yuruk","M Z Temiz","A Colakerol","A Y Muslumanoglu"],"countries":["Turkey"],"year":"2015","sources":["https://www.nature.com/articles/ijir201534"],"datasets":null,"selfreported":false,"notes":null,"methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":"No"},"last_modified":"2024-03-05T22:51:31.952Z","draft":false,"id":"yuruk2015","data":{"flaccid_stretched_bp":{"mean":14.61,"sd":2.4,"sample":50}}},{"name":"Kadono et al. 2018","type":"Standard","authors":["Y. Kadono","T. Nohara","S. Kawaguchi","J. Sakamoto","T. Makino","K. Nakashima","M. Iijima","K. Shigehara","K. Izumi","A. Mizokami"],"countries":["Japan"],"year":"2018","sources":["https://onlinelibrary.wiley.com/doi/10.1111/andr.12517"],"datasets":null,"selfreported":false,"notes":null,"methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T22:44:28.155Z","draft":false,"id":"kadono2018","data":{"flaccid_stretched_nbp":{"mean":11.72,"sd":1.39,"sample":102}}},{"name":"Takure 2021","type":"Standard","authors":["Augustine Oghenewyin Takure"],"countries":["Nigeria"],"year":"2021","sources":["https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8434794/"],"datasets":null,"selfreported":false,"notes":null,"methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":"No"},"last_modified":"2024-03-05T22:39:43.986Z","draft":false,"id":"takure2021","data":{"flaccid_length_bp":{"mean":9.8,"sd":2.7,"sample":97},"flaccid_stretched_bp":{"mean":14.1,"sd":2.1,"sample":97}}},{"name":"Mallik et al. 2021","type":"Standard","authors":["Ashraf Uddin Mallik","Md Mostafizur Rahman","Uttam Karmaker","Tamanna Jahan","Marjanul Jannat Anan","Simanta Saha","Rokeya Begum","Marufur Rahman"],"countries":["Bangladesh"],"year":"2021","sources":["https://www.banglajol.info/index.php/KYAMCJ/article/view/56552"],"datasets":null,"selfreported":false,"notes":null,"methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":"N/A"},"last_modified":"2024-03-05T22:22:51.878Z","draft":false,"id":"mallik2021","data":{"flaccid_length_nbp":{"mean":7.81,"sd":1.23,"sample":300},"flaccid_girth":{"mean":8.61,"sd":0.82,"sample":300},"flaccid_stretched_nbp":{"mean":11.21,"sd":1.2,"sample":300}}},{"name":"Oshakbayev et al. 2022","type":"Standard","authors":["Oshakbayev K","Kuttymuratov G","Ardak A","Nabiyev A","Zhankalova Z","Gazaliyeva M","Tordai A"],"countries":["Kazakhstan"],"year":"2022","sources":["https://europepmc.org/article/ppr/ppr575082"],"datasets":null,"selfreported":false,"notes":"Girth measured at thickest part of the penis.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2026-04-27T01:13:33.968Z","draft":false,"id":"oshakbayev2022","data":{"erect_volume_bp":{"mean":129.49222383169547,"sd":24.663443531923715,"location":107.29749933980355,"scale":16.475093810315038,"shape":0.2999914425258665},"erect_length_bp":{"mean":13.41,"sd":1.04,"sample":282},"erect_girth":{"mean":11.62,"sd":0.91,"sample":282}}},{"name":"Zhu et al. 1990","type":"Standard","authors":["Zhu Hui-Bin","Zhang Jun","Yu Rong-Qing","Fu Jiang-Nan","Chen Kai"],"countries":["China"],"year":"1990","sources":[],"datasets":null,"selfreported":false,"notes":"Contains flaccid/erect diameter measurements, which cannot be added at the moment due to technical limitations.\n\nHealthy premarital men (age range: 23-35yrs, mean: 29yrs) selected from family planning, maternity, and child health institutes. Excluded those with endocrine, genetic, and reproductive diseases.\n\nIncludes test to see if neg. pressure erections are same as regular erections (i.e. penis pumps). Conclusion: No, negative pressure swells penis larger than normal.","methodology":{"length":"On top","girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:43:01.940Z","draft":false,"id":"zhu1990","data":{"erect_length_nbp":{"mean":11.6,"sd":1.7,"sample":900},"flaccid_length_nbp":{"mean":6.9,"sd":1.4,"sample":900}}},{"name":"Wu et al. 1994","type":"Standard","authors":["Wu"],"countries":["China"],"year":"1994","sources":["https://www.scribd.com/doc/103024191/Chinese-Study-1994"],"datasets":null,"selfreported":false,"notes":"University students (16-40yrs, mean: 19.4yrs) measured out of total 2547 observed. Overall Average excluding phimosis. ~14% under 18yrs.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:40:10.935Z","draft":false,"id":"wu1994","data":{"flaccid_length_bp":{"mean":7.409,"sd":0.95,"sample":1449},"flaccid_girth":{"mean":8.21,"sd":0.599,"sample":1449},"flaccid_stretched_bp":{"mean":13.412,"sd":1.13,"sample":1449}}},{"name":"Wu et al. 1990","type":"Standard","authors":["Wu"],"countries":["China"],"year":"1990","sources":["https://www.scribd.com/doc/103023459/Chinese-Study-1990"],"datasets":null,"selfreported":false,"notes":"Urology patients (16 - 70yrs, mean 31yrs), normal secondary sexual characteristics, some drug-induced erections.\n\nN = 14, BP Erect measured at 90°: 13.650 cm, 5.374\". No SD. Not included due to technical limitations.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:38:58.628Z","draft":false,"id":"wu1990","data":{"flaccid_length_bp":{"mean":7.92,"sd":1.035,"sample":109},"flaccid_length_nbp":{"mean":6.62,"sd":1.02,"sample":109},"flaccid_stretched_bp":{"mean":13.896,"sd":1.126,"sample":109}}},{"name":"Wang & Li 1989","type":"Standard","authors":["Wang Run","Li Juny-ue"],"countries":["China"],"year":"1989","sources":["http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZLJZ198901026.htm"],"datasets":null,"selfreported":false,"notes":"Randomly selected male university students (mean age: 22.5, range: 18-33yrs).","methodology":{"length":"On top","girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2026-04-27T01:13:15.849Z","draft":false,"id":"wangli1989","data":{"erect_volume_nbp":{"mean":138.95628465543987,"sd":32.20845099807606,"location":99.32088567399616,"scale":16.730349284135997,"shape":0.15707350940824188},"erect_length_nbp":{"mean":13,"sd":1.3,"sample":200},"erect_girth":{"mean":12.2,"sd":1.1,"sample":200},"flaccid_length_nbp":{"mean":7.1,"sd":1.5,"sample":200},"flaccid_girth":{"mean":7.8,"sd":0.7,"sample":200}}},{"name":"Vasconcelos et al. 2012","type":"Standard","authors":["J. S. Vasconcelos","R. T. Figueiredo","F. L. B. Nascimento","R. Damiao","E. A. da Silva"],"countries":["Brazil"],"year":"2012","sources":["https://www.sciencedirect.com/science/article/pii/S0090429512009442"],"datasets":null,"selfreported":false,"notes":"Men (mean = 65yrs) with prostate cancer but no penile anomalies.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:35:28.119Z","draft":false,"id":"vasconcelos2012","data":{"flaccid_stretched_bp":{"mean":16,"sd":1.9,"sample":67}}},{"name":"Siminoski et al. 1993","type":"Standard","authors":["K. Siminoski","J. Bain"],"countries":["Canada"],"year":"1993","sources":["https://journals.sagepub.com/doi/10.1177/107906329300600305"],"datasets":null,"selfreported":false,"notes":"Virile men during physical examination (27-71yrs).","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:33:54.288Z","draft":false,"id":"siminoski1993","data":{"flaccid_length_nbp":{"mean":9.4,"sd":1.4,"sample":63}}},{"name":"Pereira 2004","type":"Standard","authors":["N. M. Pereira"],"countries":["Portugal"],"year":"2004","sources":["https://www.elsevier.es/es-revista-revista-internacional-andrologia-262-articulo-estudo-do-tamanho-do-penis-13062216"],"datasets":null,"selfreported":false,"notes":"Men (18 - 25yrs) randomly selected during military inspection. 95% white.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:33:17.179Z","draft":false,"id":"pereira2004","data":{"flaccid_length_bp":{"mean":9.86,"sd":1.835,"sample":498},"flaccid_girth":{"mean":9.39,"sd":1.047,"sample":498},"flaccid_stretched_bp":{"mean":15.14,"sd":2.116,"sample":498}}},{"name":"Shalaby et al. 2014","type":"Standard","authors":["M. E. Shalaby","A. E.-R. M. Almohsen","A. R. El Shahid","M. T. Abd Al-Sameaa","T. Mostafa"],"countries":["Egypt"],"year":"2014","sources":["https://onlinelibrary.wiley.com/doi/abs/10.1111/and.12275"],"datasets":null,"selfreported":false,"notes":"Normal men (21-40yrs), excluded: penile anomalies, epispadius, hyospadius, penile curvature, Pyronie’s disease and history of delayed puberty.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:32:10.274Z","draft":false,"id":"shalaby2014","data":{"flaccid_stretched_bp":{"mean":13.84,"sd":1.35,"sample":2000}}},{"name":"Nguyen et al. 2021 (Group 1)","type":"Standard","authors":["B. Nguyen Hoai","Q. P. Minh","T. N. Cao","A. Sansone","E. Colonnello","E. A. Jannini"],"countries":["Vietnam"],"year":"2021","sources":["https://onlinelibrary.wiley.com/doi/full/10.1111/andr.12978"],"datasets":null,"selfreported":false,"notes":"17-84 yrs. Mean age: 33.1 yrs (SD 10.7 yrs) Excluded men under 17 years old, men without the measurement of hormonal concentration, particularly with testosterone, and testicular ultrasound. Excluded those detected with genital abnormalities such as penile curvature, hypospadias, phimosis, or pre-pubertal hypogonadism. Group 1 = regular reproductive health screening.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:29:38.824Z","draft":false,"id":"nguyen2021","data":{"flaccid_stretched_bp":{"mean":14.6,"sd":1.39,"sample":3302},"flaccid_girth":{"mean":8.42,"sd":0.95,"sample":3302},"flaccid_length_bp":{"mean":8.99,"sd":1.01,"sample":3302}}},{"name":"Nasar et al. 2011","type":"Standard","authors":["T.A. Nasar","A. Gadalla","A. Zeidan","M. El Batrawy","H. Ghanem"],"countries":["Egypt"],"year":"2011","sources":["https://journals.lww.com/humanandrology/FullText/2011/08000/Relationship_between_penile_size_and_body.4.aspx#pdf-link"],"datasets":null,"selfreported":false,"notes":"Healthy (no penile curve, etc.) urology patients (21 - 45yrs), excluded micropenis and abnormalities.\n\nDoes not contain Flaccid Stretched BP standard deviation.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:28:28.319Z","draft":false,"id":"nasar2011","data":{"flaccid_length_nbp":{"mean":8.37,"sd":1.31,"sample":1000},"flaccid_stretched_bp":{"mean":13.77,"sd":0,"sample":1000}}},{"name":"Motofumi et al. 2012","type":"Standard","authors":["S. Motofumi"],"countries":["Japan"],"year":"2012","sources":["https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1442-2042.2012.03167.x"],"datasets":null,"selfreported":false,"notes":"Men (47 - 84yrs) having prostate biopsies.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:26:40.974Z","draft":false,"id":"motofumi2012","data":{"flaccid_length_nbp":{"mean":9.41,"sd":1.54,"sample":431},"flaccid_stretched_nbp":{"mean":12.22,"sd":1.72,"sample":431}}},{"name":"Hwnag et al. 2005 (Group 2)","type":"Standard","authors":["I. S. Hwnag","K.W. Kim","S.B. Ryu"],"countries":["Korea"],"year":"2005","sources":["https://www.kci.go.kr/kciportal/ci/sereArticleSearch/ciSereArtiView.kci?sereArticleSearchBean.artiId=ART001105118"],"datasets":null,"selfreported":false,"notes":"Young males brought for military draft examination,17-28 year old, excluded sexual dysfunction and congenital/acquired genital problems, or genital surgeries, or those who did not cooperate for proper measurements. Uncircumcised Group 2.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:26:02.650Z","draft":false,"id":"hwang2005","data":{"flaccid_length_bp":{"mean":8.07,"sd":1.19,"sample":568},"flaccid_stretched_bp":{"mean":11.71,"sd":1.81,"sample":568}}},{"name":"Hosseini et al. 2007 (Control)","type":"Standard","authors":["S. R. Hosseini","M. H. Khazaeli","D. Atharikia"],"countries":["Iran"],"year":"2007","sources":["https://www.sciencedirect.com/science/article/abs/pii/S174360951531818X"],"datasets":null,"selfreported":false,"notes":"Sexually active urology patients (mean age: 36.5 SD: 9.1 years) without premature ejaculation (control group). Exclusion criteria were use of drugs with side effects on ejaculation, penis anomalies and surgeries, lower urinary tract symptoms including prostatitis, psychological diseases, and erectile dysfunction.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:24:17.522Z","draft":false,"id":"hosseini2007","data":{"flaccid_stretched_nbp":{"mean":13.01,"sd":1.04,"sample":42}}},{"name":"Haliloglu et al. 2007","type":"Standard","authors":["A. Haliloglu","S. Baltaci","O. Yaman"],"countries":["Turkey"],"year":"2007","sources":["https://www.sciencedirect.com/science/article/abs/pii/S002253470602146X"],"datasets":null,"selfreported":false,"notes":"Pre-prostatectomy patients, Mean 68.8 years (range 50-79yrs). No patient had a penile abnormality (eg Peyronie’s disease) or a history of penile or urethral surgery.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:23:18.465Z","draft":false,"id":"haliloglu2007","data":{"flaccid_stretched_nbp":{"mean":14.2,"sd":1.1,"sample":47}}},{"name":"Gabrich et al. 2007","type":"Standard","authors":["P.N. Gabrich","J. S. P. Vasconcelos","R. Damiao","E. A. da Silva"],"countries":["Brazil"],"year":"2007","sources":["https://www.jped.com.br/ArtigoDetalhe.aspx?varArtigo=1671&idioma=pt-BR"],"datasets":null,"selfreported":false,"notes":"(18yrs) subset pediatric outpatients without penile anomalies.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:21:13.174Z","draft":false,"id":"gabrich2007","data":{"flaccid_stretched_bp":{"mean":14.5,"sd":1.6,"sample":84}}},{"name":"Farkas 1971","type":"Standard","authors":["L.G. Farkas"],"countries":["Czechoslovakia"],"year":"1971","sources":["https://onlinelibrary.wiley.com/doi/abs/10.1002/ajpa.1330340303"],"datasets":null,"selfreported":false,"notes":"Healthy men (18-20 yrs) randomly selected from military.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:20:39.435Z","draft":false,"id":"farkas1971","data":{"flaccid_length_nbp":{"mean":7.22,"sd":1.12,"sample":176},"flaccid_girth":{"mean":9.565,"sd":0.831,"sample":177}}},{"name":"Eisenberg et al. 2012 (OA)","type":"Standard","authors":["M.L. Eisenberg","M. Shy","R. C. Walters","L. I. Lipshultz"],"countries":["United States"],"year":"2012","sources":["https://onlinelibrary.wiley.com/doi/full/10.1111/j.1365-2605.2012.01275.x"],"datasets":null,"selfreported":false,"notes":"Obstructive azoospermic adult men (mean age 44yrs).","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:19:56.149Z","draft":false,"id":"eisenberg2012","data":{"flaccid_stretched_nbp":{"mean":12.54,"sd":2.03,"sample":69}}},{"name":"Eisenberg et al. 2011 (Control)","type":"Standard","authors":["M.L. Eisenberg","M.H.Hsieh","R.C.Walters","R.Krasnow","L.I.Lipshultz"],"countries":["United States"],"year":"2011","sources":["https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3092750/"],"datasets":null,"selfreported":false,"notes":"Control father adult (mean age: 43.6yrs SD:10.3yrs) patients at urology clinic, excluded those with history of orchiectomy, testicular torsion, or prior malignancy.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:18:50.736Z","draft":false,"id":"eisenberg2011control","data":{"flaccid_stretched_nbp":{"mean":11.95,"sd":2.27,"sample":74}}},{"name":"Chaurasia & Singh 1974","type":"Standard","authors":["B.D. Chaurasia","T.B. Singh"],"countries":["India"],"year":"1974","sources":["https://www.jstor.org/stable/29538686"],"datasets":null,"selfreported":false,"notes":"Healthy (no body abnormalities) male (17-20yrs) college students.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:17:17.620Z","draft":false,"id":"chaurasiasingh1974","data":{"flaccid_length_bp":{"mean":7.357,"sd":0.771,"sample":116},"flaccid_girth":{"mean":8.767,"sd":0.702,"sample":116}}},{"name":"Barboza et al. 2018","type":"Standard","authors":["R.A. Barboza","E.A. da Silva","T. Ruellas","R. Damiao"],"countries":["Brazil"],"year":"2018","sources":["https://www.nature.com/articles/s41443-017-0009-z?WT.feed_name=subjects_psychology"],"datasets":null,"selfreported":false,"notes":"(18 - 86yrs) consenting after routine urological appointment without genital complaint.\n\nExclusion criteria: Congenital anomalies and medical history of surgical procedures that could affect penis size. 28% were excluded from an initial 627 due to other skin color identity.\n\nThere was a significant difference in means of White and Black length, p < 0.001","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:16:23.013Z","draft":false,"id":"barboza2018","data":{"flaccid_stretched_bp":{"mean":16.06,"sd":1.64,"sample":450}}},{"name":"Choi et al. 2011","type":"Standard","authors":["Ho Choi","Khae Hawn Kim","Han Jung","Sang Jin Yoon","Soo Woong Kim","Tae Beom Kim"],"countries":["Korea"],"year":"2011","sources":["https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3739592/"],"datasets":null,"selfreported":false,"notes":"Korean men (21 - 89yrs) at hospital for urological surgery, excluded hypospadia, urethral stricture, Peyronie’s disease, penile cancer, or a history of endocrine disease, urethroplasty or other penile surgery affecting size (except for circumcision).\n\n2nd digit/4th digit ratio is inversely related to stretched length.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:14:45.206Z","draft":false,"id":"choi2011","data":{"flaccid_length_bp":{"mean":7.7,"sd":1.7,"sample":144},"flaccid_stretched_bp":{"mean":11.7,"sd":1.9,"sample":144}}},{"name":"Stewart et al. 2009","type":"Standard","authors":["T. M. Stewart","D.Y. Liu","C. Garrett","N. Jorgensen","E.H. Brown","H.W.G. Baker"],"countries":["Austalia"],"year":"2009","sources":["https://academic.oup.com/humrep/article/24/7/1561/2357470"],"datasets":null,"selfreported":false,"notes":"Male (21-46yrs) partners of pregnant (naturally conceived) women. 24% participation rate.\n\nCorrelation between testicular volume and stretched length.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:09:31.946Z","draft":false,"id":"stewart2009","data":{"flaccid_stretched_bp":{"mean":15,"sd":1.7,"sample":224}}},{"name":"Foresta et al. 2018","type":"Standard","authors":["C. Foresta","U. Valente","A. Di Nisio","N. Cacco","S. Magagna","I. Cosci","A. Presciutti","A. Garolla"],"countries":["Italy"],"year":"2018","sources":["https://academic.oup.com/humrep/article/33/9/1628/5055924?login=false"],"datasets":null,"selfreported":false,"notes":"Students (18 - 19yrs) only included those who consented to be included.\n\nMeasured on top of penis with patient lying on back, using measuring tape (not very bone pressed).\n\nAnogential Distance is directly related with testicular volume, and both flaccid penile length and circumference.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:08:42.490Z","draft":false,"id":"foresta2018","data":{"flaccid_length_bp":{"mean":8.9,"sd":1.7,"sample":794},"flaccid_girth":{"mean":9.4,"sd":1.1,"sample":794}}},{"name":"Tomova et al. 2010","type":"Standard","authors":["A. Tomova","F. Deepinder","R. Robeva"],"countries":["Bulgaria"],"year":"2010","sources":["https://jamanetwork.com/journals/jamapediatrics/fullarticle/384064"],"datasets":null,"selfreported":false,"notes":"Random patients. Most Fully Developed Age Group (Students 19yrs).","methodology":{"length":null,"girth":"Base-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:07:37.064Z","draft":false,"id":"tomova2010","data":{"flaccid_length_nbp":{"mean":9.46,"sd":1.12,"sample":310},"flaccid_girth":{"mean":9.67,"sd":0.91,"sample":310}}},{"name":"Spyropoulos et al. 2005","type":"Standard","authors":["E. Spyropoulos","C. Christoforidis","D. Borousas","S. Mavrikos","M. Bourounis","S. Athanasiadis"],"countries":["Greece"],"year":"2005","sources":["https://www.sciencedirect.com/science/article/abs/pii/S030228380500093X?via%3Dihub"],"datasets":null,"selfreported":false,"notes":"Subcoronal flaccid girth: (cm) 6.0 (0.4) cm.\n\nMen undergoing penis enlargement surgery.","methodology":{"length":null,"girth":"Base-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:05:44.555Z","draft":false,"id":"spyropoulos2005","data":{"flaccid_girth":{"mean":6.4,"sd":0.5,"sample":11},"flaccid_stretched_nbp":{"mean":9.12,"sd":1.175,"sample":11}}},{"name":"Mehraban et al. 2006","type":"Standard","authors":["D. Mehraban","M. Salehi","F. Zayeri"],"countries":["Iran"],"year":"2006","sources":["https://www.nature.com/articles/3901532"],"datasets":null,"selfreported":false,"notes":"Healthy (Excluded: infertility, cryptorchidism, hypospadias, surgery other than circumcision, or any malignant penile condition) random subset of clinic patients (20-40yrs) consenting after knowledge of penis measurement.","methodology":{"length":null,"girth":"Base-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T10:05:06.825Z","draft":false,"id":"mehraban2006","data":{"flaccid_girth":{"mean":8.66,"sd":1.01,"sample":1500},"flaccid_stretched_nbp":{"mean":11.58,"sd":1.42,"sample":1500}}},{"name":"Kamel et al. 2009 (Group 1)","type":"Standard","authors":["I. Kamel","A. Gadalla","H. Ghanem","M. 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Group 2 includes only 21-23yrs students.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2024-03-05T09:56:59.712Z","draft":false,"id":"ajmani1985group2","data":{"flaccid_length_nbp":{"mean":8.26,"sd":1.52,"sample":115},"flaccid_girth":{"mean":8.87,"sd":0.975,"sample":115}}},{"name":"Khan et al. 2012","type":"Standard","authors":["S. Khan","B. Somani","W. Lam","R. 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Patients with congenital or acquired anomalies of the penis, such as Peyronie’s disease, partial or total penectomies, penile prosthesis, urethral surgeries, severe phimosis were excluded.","methodology":{"length":null,"girth":"Base-shaft","position":null,"drug_induced":"N/A","erectile_dysfunction":"No"},"last_modified":"2022-10-24T18:17:52.486Z","draft":false,"id":"sole","data":{"flaccid_length_bp":{"mean":11.4,"sd":2,"sample":800},"flaccid_girth":{"mean":10.1,"sd":1.3,"sample":800},"flaccid_stretched_bp":{"mean":15.2,"sd":2.2,"sample":800}}},{"name":"Middle Eastern Average","type":"Aggregate","authors":[],"countries":["Saudi Arabia","Egypt","Turkey","Iran","Israel"],"year":null,"sources":[],"datasets":["habous2015-2","salama1","salama2","aslan","kamel2009group1","mehraban2006","hosseini2007","haliloglu2007","shalaby2014","yuruk2015","soylemez","chenj","habous2015-1","habous2017","kamel2009group2"],"selfreported":false,"notes":"This is an aggregate dataset containing only healthy verified measurements. 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It is not a fixed list, but instead, datasets are added or removed from it as new information and research is done.\n\nWestern is defined as: The Americas, Europe and Oceania.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2026-04-27T01:14:25.949Z","draft":false,"@odata":{"id":"https://dstats.calcsd.info/api/odata/manage/datasets('average-western')","editLink":"https://dstats.calcsd.info/api/odata/manage/datasets('average-western')","context":"https://dstats.calcsd.info/api/odata/manage/$metadata#datasets/$entity"},"id":"average-western","data":{"erect_volume_nbp":{"mean":137.81542701985109,"sd":54.0599802225655,"location":44.072686958813605,"scale":12.09533059652384,"shape":0.023356799716126045},"erect_volume_bp":{"mean":153.0872998314117,"sd":49.569136120884814,"location":74.16867637643676,"scale":15.974209009251629,"shape":0.0516166029170899},"erect_length_nbp":{"mean":12.89,"sd":2.91,"sample":80},"erect_girth":{"mean":12.052173913043479,"sd":1.5317391304347825,"sample":230},"flaccid_stretched_bp":{"mean":15.450788425803026,"sd":1.99040031855588,"sample":3767},"flaccid_stretched_nbp":{"mean":12.50648821646785,"sd":2.4968810008728544,"sample":3437},"flaccid_girth":{"mean":9.843826801727001,"sd":0.9167706741946198,"sample":6022},"flaccid_length_nbp":{"mean":8.932104923672329,"sd":1.8283293915287038,"sample":4651},"flaccid_length_bp":{"mean":10.227886664933715,"sd":1.7460176761112554,"sample":3847},"erect_length_bp":{"mean":14.479787685774946,"sd":2.020148619957537,"sample":471}}},{"name":"Son 1999","type":"Standard","authors":["H. 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Erection by self-stimulation (excluded 15 males unable to get sufficient erection).","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":"No","erectile_dysfunction":"No"},"last_modified":"2026-04-27T01:10:40.218Z","draft":false,"id":"son","data":{"erect_volume_nbp":{"mean":99.02262806128118,"sd":26.851339571047976,"location":62.898781408432015,"scale":12.408199822137007,"shape":0.11825347851751859},"erect_volume_bp":{"mean":109.02402210015752,"sd":28.503376953340847,"location":70.81767079256835,"scale":13.243852609172176,"shape":0.11981039709884875},"erect_length_bp":{"mean":11.9,"sd":1.3,"sample":156},"erect_length_nbp":{"mean":10.8,"sd":1.3,"sample":156},"erect_girth":{"mean":11.3,"sd":1.2,"sample":156},"flaccid_length_nbp":{"mean":6.1,"sd":1.3,"sample":156},"flaccid_girth":{"mean":8.9,"sd":0.8,"sample":156},"flaccid_stretched_nbp":{"mean":9.6,"sd":1.2,"sample":156}}},{"name":"Ali & Ali 2012","type":"Standard","authors":["S. A. Ali","A. E. Ali"],"countries":["Saudi Arabia"],"year":"2012","sources":["https://ojs.klobexjournals.com/index.php/ijbhs/article/view/1199"],"datasets":null,"selfreported":false,"notes":"WARNING! It's been noticed that this study may contain inconsistent data between its Results and Discussion section. The numbers reported may not be reliable.\n\nWhile average fat-pad depth was measured, no BP measurements or data were made available.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":"No"},"last_modified":"2026-04-27T01:09:54.483Z","draft":false,"id":"ali","data":{"erect_volume_nbp":{"mean":157.766024000584,"sd":46.833654317497896,"location":88.2292408808804,"scale":18.103466232920102,"shape":0.07785303132901608},"erect_length_nbp":{"mean":13.7,"sd":1.6,"sample":200},"erect_girth":{"mean":12.6,"sd":1.5,"sample":200},"flaccid_length_nbp":{"mean":9.3,"sd":1.3,"sample":200},"flaccid_girth":{"mean":8.3,"sd":1.2,"sample":200}}},{"name":"/r/BigDickProblems Average","type":"Standard","authors":["/u/HrDedgeh"],"countries":[],"year":"2019","sources":["https://calcsd.neocities.org/bdp2019/results.html"],"datasets":null,"selfreported":true,"notes":"This was a for-fun survey made on 2019. It has almost no scientific merit, except maybe being a reference point as to how self-reported datasets differentiate themselves from verified ones.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2026-04-27T01:09:42.785Z","draft":false,"id":"bdp","data":{"erect_volume_bp":{"mean":271.69526507261656,"sd":74.75670067316383,"location":163.08708026596088,"scale":30.242012250542096,"shape":0.08646946679404852},"erect_length_bp":{"mean":18.48,"sd":1.99,"sample":1383},"erect_girth":{"mean":14.23,"sd":1.57},"flaccid_length_bp":{"mean":10.6,"sd":2.58,"sample":1232},"flaccid_girth":{"mean":9.49,"sd":2.45,"sample":1117}}},{"name":"Global Average","type":"Aggregate","authors":[],"countries":["Italy","Saudi Arabia","Egypt","Korea","Germany","China","Argentina","Brazil","United States","Turkey","France","Iran","Bulgaria","Austalia","Nigeria","India","Czechoslovakia","Japan","Vietnam","Portugal","Canada","Kazakhstan","Bangladesh","United Kingdom","Israel","Colombia"],"year":null,"sources":[],"datasets":["ponchietti","habous2015-2","parkk","parkj","schneider","salama1","salama2","wu","son","sole","yoon","ros","wessells","aslan","bondil1992","savoie2003","kamel2009group1","mehraban2006","tomova2010","foresta2018","stewart2009","ajmani1985group2","choi2011","barboza2018","chaurasiasingh1974","farkas1971","haliloglu2007","hosseini2007","hwang2005","gabrich2007","motofumi2012","nguyen2021","shalaby2014","pereira2004","siminoski1993","vasconcelos2012","wangli1989","wu1990","oshakbayev2022","mallik2021","takure2021","kadono2018","yuruk2015","kamel2009group2","zhu1990","wu1994","eisenberg2011control","khan2012","son2003","soylemez","habous2017","promodu","habous2015-1","chenj","acuna"],"selfreported":false,"notes":"This is an aggregate dataset containing only healthy verified measurements, globally. It is not a fixed list, but instead, datasets are added or removed from it as new information and research is done.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2026-04-27T01:14:14.146Z","draft":false,"@odata":{"id":"https://dstats.calcsd.info/api/odata/manage/datasets('average-global')","editLink":"https://dstats.calcsd.info/api/odata/manage/datasets('average-global')","context":"https://dstats.calcsd.info/api/odata/manage/$metadata#datasets/$entity"},"id":"average-global","data":{"erect_volume_nbp":{"mean":119.54662689261656,"sd":36.47432296779358,"location":64.62932602306788,"scale":13.660741522198173,"shape":0.07242124866000077},"erect_volume_bp":{"mean":137.67275903756163,"sd":39.65077245593638,"location":79.36867514466323,"scale":15.649025960507739,"shape":0.08167024940642914},"flaccid_length_bp":{"mean":9.066665056615724,"sd":1.281152189405337,"sample":12629},"erect_length_nbp":{"mean":12.128637020968908,"sd":1.7207411424439625,"sample":2766},"flaccid_stretched_bp":{"mean":13.893320233236153,"sd":1.598759766763848,"sample":17150},"erect_girth":{"mean":11.658824982357093,"sd":1.3457357092448834,"sample":2834},"erect_length_bp":{"mean":14.002638623326959,"sd":1.6864063097514341,"sample":3138},"flaccid_stretched_nbp":{"mean":12.201990321379824,"sd":1.8967153492989202,"sample":8059},"flaccid_girth":{"mean":9.034864408680534,"sd":0.9054444569057364,"sample":17833},"flaccid_length_nbp":{"mean":8.501424272818454,"sd":1.5930502618968019,"sample":8973}}},{"name":"Salama 2015 [2]","type":"Standard","authors":["N. Salama"],"countries":["Egypt"],"year":"2015","sources":["https://journals.sagepub.com/doi/full/10.1177/1557988315592026"],"datasets":null,"selfreported":false,"notes":"Possible overlap with Salama 2015 [1]. N = 105 Control No ED men. N =105 ED Diabetic men. N = 105 ED Non-diabetic men. The data reported here only includes N = 105 Control No ED men.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":"Yes","erectile_dysfunction":"No"},"last_modified":"2026-04-27T01:09:18.838Z","draft":false,"id":"salama2","data":{"erect_volume_nbp":{"mean":131.51513961304374,"sd":31.34602080711501,"location":93.4524695564898,"scale":16.5288786018129,"shape":0.16301910444412693},"erect_volume_bp":{"mean":153.59665925257923,"sd":34.74682894551919,"location":113.37498442039552,"scale":19.25475264639581,"shape":0.18453530820652292},"erect_length_bp":{"mean":15.04,"sd":1.51,"sample":105},"erect_length_nbp":{"mean":12.88,"sd":1.46,"sample":105},"erect_girth":{"mean":11.92,"sd":1.06,"sample":105},"flaccid_length_bp":{"mean":10,"sd":1.56,"sample":105},"flaccid_length_nbp":{"mean":7.81,"sd":1.31,"sample":105},"flaccid_girth":{"mean":9.14,"sd":0.89,"sample":105}}},{"name":"Salama 2015 [1]","type":"Standard","authors":["N. Salama"],"countries":["Egypt"],"year":"2015","sources":["https://journals.sagepub.com/doi/full/10.1177/1557988314565167"],"datasets":null,"selfreported":false,"notes":"N = 239, men (17-55yrs) complaining about small penis, and N = 59 men (22-43yrs) without this complaint. The data reported here only applies to the 59 men without this complaint.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":"Yes","erectile_dysfunction":"No"},"last_modified":"2026-04-27T01:08:50.252Z","draft":false,"id":"salama1","data":{"erect_volume_nbp":{"mean":130.04849933660756,"sd":31.830879963454414,"location":90.81671012129189,"scale":16.504670615081245,"shape":0.1563819546529399},"erect_volume_bp":{"mean":150.15083506857485,"sd":35.175118360505614,"location":106.18339440359074,"scale":17.939900220240823,"shape":0.15015506813849122},"erect_length_bp":{"mean":15,"sd":1.8,"sample":59},"erect_length_nbp":{"mean":13,"sd":1.7,"sample":59},"erect_girth":{"mean":11.8,"sd":1,"sample":59},"flaccid_length_bp":{"mean":10.02,"sd":1.9,"sample":59},"flaccid_length_nbp":{"mean":8.05,"sd":1.8,"sample":59},"flaccid_girth":{"mean":8.98,"sd":0.9,"sample":59}}},{"name":"Wu & Yang 1993","type":"Standard","authors":[],"countries":["China"],"year":"1993","sources":["https://www.scribd.com/document/103024071/Chinese-Study-1993"],"datasets":null,"selfreported":false,"notes":null,"methodology":{"length":null,"girth":null,"position":null,"drug_induced":"Yes","erectile_dysfunction":null},"last_modified":"2026-04-27T01:08:37.540Z","draft":false,"id":"wu","data":{"erect_volume_bp":{"mean":117.3385290219392,"sd":21.698042922796716,"location":99.17404599163902,"scale":15.059644321389609,"shape":0.33284374454933974},"erect_length_bp":{"mean":13.51,"sd":1.08,"sample":104},"erect_girth":{"mean":11.03,"sd":0.83,"sample":89},"flaccid_length_bp":{"mean":8.04,"sd":1.1,"sample":104},"flaccid_length_nbp":{"mean":6.91,"sd":1.16,"sample":104},"flaccid_girth":{"mean":8.48,"sd":0.76,"sample":89},"flaccid_stretched_bp":{"mean":13.81,"sd":1.15,"sample":104}}},{"name":"Habous et al. 2017","type":"Standard","authors":["M. Habous","G. Muir","T. Soliman","M. Farag","B. Williamson","S. Binsaleh","W. Elhadek","S. Mahmoud","H. Ibrahim","O. Abdelwahab","Z. Abdelrahman","M. Abdelkader","L. C. Jenkins","J. P. Mulhall"],"countries":[],"year":"2017","sources":["https://www.nature.com/articles/s41443-017-0013-3?platform=hootsuite"],"datasets":null,"selfreported":false,"notes":"Urology patients (ED and/or penile concerns), excluded penile abnormalities and incomplete erections.","methodology":{"length":null,"girth":"Base-shaft","position":null,"drug_induced":"Yes","erectile_dysfunction":"Yes"},"last_modified":"2026-04-27T01:08:30.639Z","draft":false,"id":"habous2017","data":{"erect_volume_nbp":{"mean":125.45376224614809,"sd":41.997813232281814,"location":57.0604684937489,"scale":12.548701535861657,"shape":0.04366425439816243},"erect_volume_bp":{"mean":144.79332551258418,"sd":46.41518919074177,"location":70.37426946951786,"scale":14.62631511201934,"shape":0.049109618130741176},"erect_length_bp":{"mean":14.43,"sd":2.023,"sample":201},"erect_length_nbp":{"mean":12.51,"sd":1.99,"sample":201},"erect_girth":{"mean":11.74,"sd":1.465,"sample":201},"flaccid_stretched_bp":{"mean":11.57,"sd":1.648,"sample":201},"flaccid_stretched_nbp":{"mean":9.58,"sd":1.639,"sample":201}}},{"name":"Promodu et al. 2007 (Groups 1 and 3)","type":"Standard","authors":["K. Promodu","K. V. Shanmughadas","S. Bhat","K. R. Nair"],"countries":["India"],"year":"2007","sources":["https://www.nature.com/articles/3901569"],"datasets":null,"selfreported":false,"notes":"N = 301 sexual dysfunction / urology clinic adult (18-60yrs) patients. Subgroups: N = 93 (group 2) self-measured erect, N = 41 (group 3) Urologist measured erect.\n\nErect measures are of the N = 41 subgroup.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":"Yes"},"last_modified":"2026-04-27T01:08:20.383Z","draft":false,"id":"promodu","data":{"erect_volume_bp":{"mean":122.56417777724137,"sd":30.248337215399946,"location":84.5377679186528,"scale":15.320719989073304,"shape":0.14762793303943822},"erect_length_bp":{"mean":12.93,"sd":1.63,"sample":41},"erect_girth":{"mean":11.49,"sd":1.04,"sample":41},"flaccid_length_nbp":{"mean":8.21,"sd":1.44,"sample":301},"flaccid_girth":{"mean":9.14,"sd":1.02,"sample":301},"flaccid_stretched_nbp":{"mean":10.88,"sd":1.42,"sample":301}}},{"name":"Wessells et al. 1996","type":"Standard","authors":["H. Wessells","T. F. Lue","J. W. McAninch"],"countries":["United States"],"year":"1996","sources":["https://pubmed.ncbi.nlm.nih.gov/8709382/"],"datasets":null,"selfreported":false,"notes":"(21 - 82yrs) with no penile abnormalities.","methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":"Yes","erectile_dysfunction":null},"last_modified":"2026-04-27T01:08:11.986Z","draft":false,"id":"wessells","data":{"erect_volume_nbp":{"mean":142.18067560235818,"sd":51.1188856411012,"location":60.51844604782056,"scale":16.29869661221968,"shape":0.05040574374405268},"erect_volume_bp":{"mean":173.0618386026419,"sd":53.28959564581984,"location":92.02293918725051,"scale":19.48877576400868,"shape":0.06859636401767796},"erect_length_bp":{"mean":15.74,"sd":2.62,"sample":80},"erect_length_nbp":{"mean":12.89,"sd":2.91,"sample":80},"erect_girth":{"mean":12.3,"sd":1.31,"sample":80},"flaccid_girth":{"mean":9.71,"sd":1.17,"sample":80}}},{"name":"Schneider et al. 2001","type":"Standard","authors":["T. Schneider","H. Sperling","G. Lümmen","J. Syllwasschy","H. Rübben"],"countries":["Germany"],"year":"2001","sources":["https://www.sciencedirect.com/science/article/pii/S0090429500009250"],"datasets":null,"selfreported":false,"notes":"Study consists of Group A of young men (18-19yrs) and Group B of urology patients with ED (40-68yrs). This data only includes Group A.\n\nExcluded those with a history of radical prostatectomy, urethral surgery, or Peyronie’s disease.","methodology":{"length":null,"girth":"Base-shaft","position":null,"drug_induced":"No","erectile_dysfunction":"No"},"last_modified":"2022-08-14T00:19:40.798Z","draft":false,"id":"schneider","data":{"erect_length_bp":{"mean":14.48,"sd":1.99,"sample":111},"flaccid_length_bp":{"mean":8.6,"sd":1.5,"sample":111}}},{"name":"Park et al. 2016","type":"Standard","authors":["Jong Kwan Park","A. Ram Doo","Joo Hueng Kim","Hyung Sub Park","Jung Mo Do","Hwang Choi","Seung Chol Park","Myung Ki Kim","Young Beom Jeong","Hyung Jim Kim","Young Gon Kim","Yu Seob Shin"],"countries":["Korea"],"year":"2016","sources":["https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5028213/"],"datasets":null,"selfreported":false,"notes":"(18-28yrs) previously undergone circumcision. Excluded: men with hypospadias, urethral stricture, Peyronie’s disease, penile cancer, or a history of endocrine disease, urethroplasty, or other penile surgeries","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2022-08-14T00:10:44.599Z","draft":false,"id":"parkj","data":{"erect_length_bp":{"mean":13.53,"sd":1.68,"sample":248},"flaccid_length_bp":{"mean":7.39,"sd":1.52,"sample":248}}},{"name":"Park et al. 1998","type":"Standard","authors":["Kwanjin Park","Soo Woong Kim","Hae Won Lee","Eun Sik Lee","Chong Wook Lee","Si Whang Kim","Jae-Seung Paick"],"countries":["Korea"],"year":"1998","sources":["http://pdf.medrang.co.kr/paper/pdf/Androl/Kjan016-02-06.pdf"],"datasets":null,"selfreported":false,"notes":"Healthy hospital patients, excluded affecting diseases and not full erections. Drug-induced erections","methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":"No"},"last_modified":"2026-04-27T01:07:43.350Z","draft":false,"id":"parkk","data":{"erect_volume_nbp":{"mean":125.17442336618771,"sd":29.978210674337323,"location":88.53149639083091,"scale":15.691638461334913,"shape":0.16007417008488634},"erect_volume_bp":{"mean":148.00582494278382,"sd":34.731845582994126,"location":105.51562754632133,"scale":18.162108548885012,"shape":0.1596880986739696},"erect_length_bp":{"mean":14.06,"sd":1.49,"sample":287},"erect_length_nbp":{"mean":11.88,"sd":1.32,"sample":287},"erect_girth":{"mean":12.11,"sd":1.1,"sample":287},"flaccid_length_nbp":{"mean":7.76,"sd":1.19,"sample":287},"flaccid_girth":{"mean":9.02,"sd":1.16,"sample":287},"flaccid_stretched_nbp":{"mean":12.3,"sd":1.33,"sample":287}}},{"name":"Habous et al. 2015 [2]","type":"Standard","authors":["M. Habous","G. Muir","A. Tealab","B. Williamson","M. Elkhouly","W. Elhadek","S. Mahmoud","O. Laban","S. Binsaleh","O. Abdelwahab","J. Mulhall","D. Veale"],"countries":["Saudi Arabia","Egypt"],"year":"2015","sources":["https://www.sciencedirect.com/science/article/pii/S1743609515344271"],"datasets":null,"selfreported":false,"notes":"Adult andrology patients (20-75yrs). Excluded previous penile surgery (excluding circumcision), Peyronie’s disease, congenital curvature or hypospadias, and those unable to get full drug-induced erection.\n\nFlaccid measurements underestimated erect size. Demonstrated significant inter-observer measurement variability. Inter-observer discrepancy between stretched flaccid and erect length: 2.9 ± 0.6 cm (range 2.0–3.5). Discrepancy between stretched and erect circumference: 2.5 ± 0.5 cm (range 1.7–3.1).","methodology":{"length":null,"girth":"Base-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"last_modified":"2026-04-27T01:07:33.185Z","draft":false,"id":"habous2015-2","data":{"erect_volume_bp":{"mean":140.22306070461332,"sd":45.97584969740585,"location":66.57140664396323,"scale":14.528111864278227,"shape":0.04941271499141901},"erect_length_bp":{"mean":14.3,"sd":2,"sample":201},"erect_girth":{"mean":11.6,"sd":1.5,"sample":201},"flaccid_girth":{"mean":9.4,"sd":1.5,"sample":201},"flaccid_stretched_bp":{"mean":11.7,"sd":1.6,"sample":2001}}},{"name":"Habous et al. 2015 [1]","type":"Standard","authors":["M. Habous","A. Tealab","B. Williamson","S. Binsaleh","S. El Dawy","S. Mahmoud","O. Abdelwahab","M. Nassar","J. Mulhall","D. Veale","G. Muir"],"countries":["Saudi Arabia"],"year":"2015","sources":["https://www.sciencedirect.com/science/article/abs/pii/S174360951531050X"],"datasets":null,"selfreported":false,"notes":"778 healthy (no: small penis complaint, penile trauma, curve, or previous use of injection for ED) adult (20-82yrs) Middle Eastern men ethnically \"homogeneous population.\" (348 with ED, 438 general concern about penis)\n\nMean and SD were not reported to be significantly different between the ED and non-ED groups.\n\nAge significantly but weakly correlated to erect lengths\n(possibly due to past dietary insufficiency at region affecting the older age group)\nBone pressed erect length highly correlated to erect girth\nFat does not affect girth","methodology":{"length":null,"girth":"Base-shaft","position":null,"drug_induced":"Yes","erectile_dysfunction":"Yes"},"last_modified":"2026-04-27T01:07:23.853Z","draft":false,"id":"habous2015-1","data":{"erect_volume_nbp":{"mean":121.54049649214268,"sd":45.73979818416134,"location":42.53766773544493,"scale":10.474475593844804,"shape":0.024543649486659904},"erect_volume_bp":{"mean":138.9788317686934,"sd":49.789073573806746,"location":55.35577443412315,"scale":13.144935406300434,"shape":0.03332563862357671},"erect_length_bp":{"mean":14.34,"sd":1.86,"sample":778},"erect_length_nbp":{"mean":12.53,"sd":1.93,"sample":778},"erect_girth":{"mean":11.5,"sd":1.74,"sample":778}}},{"name":"Chen et al. 2000","type":"Standard","authors":["J. Chen","A. Gefen","A. Greenstein","H. Matzkin","D. Elad"],"countries":["Israel"],"year":"2000","sources":["https://www.nature.com/articles/3900627"],"datasets":null,"selfreported":false,"notes":"Healthy (no penis curve) men evaluated for ED at ED clinic, excluded 15 'unhealthy' men. Patient lying on back.","methodology":{"length":null,"girth":"Base-shaft","position":null,"drug_induced":"Yes","erectile_dysfunction":"Yes"},"last_modified":"2026-04-27T01:07:14.158Z","draft":false,"id":"chenj","data":{"erect_volume_bp":{"mean":118.06692605952824,"sd":40.56958151551007,"location":51.701869028482406,"scale":11.92502203622476,"shape":0.04211986910846165},"erect_length_bp":{"mean":13.6,"sd":1.7,"sample":55},"erect_girth":{"mean":10.9,"sd":1.6,"sample":55},"flaccid_length_bp":{"mean":8.3,"sd":1.3,"sample":55},"flaccid_girth":{"mean":8.1,"sd":1.5,"sample":55},"flaccid_stretched_bp":{"mean":12.5,"sd":1.4,"sample":55}}},{"name":"Acuña Cañas et al. 1999","type":"Standard","authors":["A. Canãs","J. Villalba"],"countries":["Colombia"],"year":"1999","sources":["https://encolombia.com/medicina/revistas-medicas/urologia/vol-8299/urologia8299-estudio"],"datasets":null,"selfreported":false,"notes":"Caucasians (22-84yrs) consulting for ED, excluded those unable to get 70% erection.","methodology":{"length":null,"girth":null,"position":null,"drug_induced":"Yes","erectile_dysfunction":"Yes"},"last_modified":"2022-10-21T20:38:19.026Z","draft":false,"id":"acuna","data":{"erect_length_bp":{"mean":13.9,"sd":1.7,"sample":130},"flaccid_length_bp":{"mean":10.49,"sd":1.3,"sample":130},"flaccid_length_nbp":{"mean":8.95,"sd":1.5,"sample":130},"flaccid_stretched_bp":{"mean":13.6,"sd":1.6,"sample":130}}},{"name":"Ponchietti et al. 2001","type":"Standard","authors":["Roberto Ponchietti","Nicola Mondaini","Massimiliano Bonafè","Filippo Di Loro","Stefano Biscioni","Lorenzo Masieri"],"countries":["Italy"],"year":"2001","sources":["https://doi.org/10.1159/000052434"],"datasets":null,"selfreported":false,"methodology":{"length":null,"girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"notes":"This study has a truly random sample from a compulsory inspection of all Italian males (aged 17-19 yrs). It is one of the only studies not affected by volunteer bias. It also heavily rounded all its results to the nearest half cm.\nDue to finding minor left skew, the normal approximation is slightly inconsistent with the percentiles given in the study (though the slight left skew might be explained by the presence of not yet fully developed younger males or the distribution of body fat % having a right skew).","last_modified":"2022-10-21T21:56:59.289Z","draft":false,"id":"ponchietti","data":{"flaccid_length_nbp":{"mean":9,"sd":2,"sample":3300},"flaccid_girth":{"mean":10,"sd":0.75,"sample":3300},"flaccid_stretched_nbp":{"mean":12.5,"sd":2.5,"sample":3300}}},{"name":"LifeStyles Condoms 2001","type":"Standard","authors":["LifeStyles Condoms"],"countries":["United States","Mexico"],"year":"2001","sources":["https://web.archive.org/web/20051028235158/http://www.free-condom-stuff.com/education/research.htm"],"datasets":null,"selfreported":false,"methodology":{"length":null,"girth":null,"position":null,"drug_induced":null,"erectile_dysfunction":null},"notes":"There are many sources of fake data online for this study, in reality almost nothing more than what is found in the above source link has been provided by its authors. The only other reliable source of information seems to be this <a href='https://web.archive.org/web/20010920000106/http://www.abcnews.go.com/sections/us/WolfFiles/wolffiles155.html'>online article</a>, which was published 3 weeks after the study finished collecting data and includes somewhat reliable information from interviews of the researchers.","last_modified":"2026-04-27T01:06:52.686Z","draft":false,"id":"lifestyles","data":{"erect_volume_bp":{"mean":172.35749070534385,"sd":48.53112796878545,"location":101.84228850129708,"scale":19.628230498749662,"shape":0.08642341894771732},"erect_length_bp":{"mean":14.93,"sd":2.1,"sample":300},"erect_girth":{"mean":12.63,"sd":1.29,"sample":300}}},{"name":"Herbenick et al. 2014","type":"Standard","authors":["Debby Herbenick","Michael Reece","Vanessa Schick","Stephanie A. Sanders"],"countries":["United States"],"year":"2014","sources":["https://www.ncbi.nlm.nih.gov/pubmed/23841855"],"datasets":null,"selfreported":true,"methodology":{"length":"Underside","girth":"Mid-shaft","position":null,"drug_induced":null,"erectile_dysfunction":null},"notes":null,"last_modified":"2026-04-28T00:55:31.498Z","draft":false,"id":"herbenick","data":{"erect_volume_bp":{"mean":0,"sd":0,"location":26.924004223750885,"scale":7.751342386347282,"shape":0.005238221782852463},"erect_length_bp":{"mean":14.15,"sd":2.66,"sample":1661},"erect_girth":{"mean":12.23,"sd":2.23,"sample":1661}}}]