- While there are probably some real differences between populations, differences among different Caucasoid and Negroid populations, at least, appear to be greater than any overall differences between macroraces. I don't find this surprising, since if we looked at, say, height, the same would probably be true.
- I'm not convinced the data support any difference between Northern Europeans and West Africans, and if differences exist, they are relatively minor.
- To the extent we can say anything about intra-Caucasoid differences, there appears to be a trend of declining penis size from Northern/western Europe towards SE Europe, the Middle East, and South Asia.
- Reported values for East Asia do appear to tend toward the low end among worldwide populations.
- Racial and ethnic variation in penis size, pt. 1: some background
- "Oversized" Penile Length In The Black People; Myth Or Reality
- Rushton and genital size: one more time
- Can racial differences in circulating testosterone explain racial differences in crime?
 11 Son H, Lee H, Huh JS, Kim SW, Paick JS. Studies on self-esteem of penile size in young Korean military men. Asian J Androl 2003; 5 : 185–9
 Schonfeld WA, Beebe GW. Normal growth and variation in the male genitalia from birth to maturity. J Urol 1942; 48 : 759–77
 14 Wessells H, Lue TF, McAninch JW. Penile length in the flaccid and erect states: guidelines for penile augmentation. J Urol 1996; 156 : 995–7
 15 Schneider T, Sperling H, Lummen G, Syllwasschy J, Rubben H. Does penile size in younger men cause problems with condom use? A prospective measurement of penile dimensions in 111 young and 32 older men. Urology 2001; 57 : 314–8
 17 Savoie M, Kim SS, Soloway MS. A prospective study measuring penile length in men treated with radical prostatectomy for prostate cancer. J Urol 2003; 169 : 1462–4
 18 Ponchietti R, Mondaini N, Bonafe M, Di Loro F, Biscioni S, Masieri L. Penile length and circumference: a study on 3,300 young Italian males. Eur Urol 2001; 39 : 183–6
 Richters J, Gerofi J, Donovan B. Are condoms the right size? A method for self-measurement of the erect penis. Venereology 1995; 8 : 77–81
 Smith AM, Jolly D, Hocking J, Benton K, Gerofi J. Does penis size influence condom slippage and breakage? Int J STD AIDS 1998; 9 : 444–7
 Sengezer M, Ozturk S, Deveci M. Accurate method for determining functional penile length in Turkish young men. Ann Plast Surg 2002; 48 : 381–5
 Shah J, Christopher N. Can shoe size predict penile length? BJU Int 2002; 90 : 586–7
 : Anthropol Anz. 1985 Jun;43(2):179-86.Links Anthropometric study of male external genitalia of 320 healthy Nigerian adults. Ajmani ML, Jain SP, Saxena SK.
 West Afr J Med. 2006 Jul-Sep;25(3):223-5.Links Can physique and gluteal size predict penile length in adult Nigerian men? Orakwe JC, Ogbuagu BO, Ebuh GU.
 Int J Impot Res. 2007 May-Jun;19(3):303-9. Epub 2006 Dec 7.Click here to read Links Penile size and somatometric parameters among Iranian normal adult men. Mehraban D, Salehi M, Zayeri F.
 J Sex Med. 2008 Jan;5(1):206-9. Epub 2007 Apr 19.Click here to read Links Role of postcircumcision mucosal cuff length in lifelong premature ejaculation: a pilot study. Hosseini SR, Khazaeli MH, Atharikia D.
 American Journal of Physical Anthropology Volume 34, Issue 3 , Pages 325 - 328 Published Online: 28 Apr 2005 Copyright © 1971 Wiley-Liss, Inc., A Wiley Company Article Basic morphological data of external genitals in 177 healthy central European men L. G. Farkas The Research Institute, The Hospital for Sick Children, Toronto, Ontario, Canada
 Eur Urol. 2002 Nov;42(5):426-31.Click here to read Links What importance do women attribute to the size of the penis? Francken AB, van de Wiel HB, van Driel MF, Weijmar Schultz WC.
 Today Xinhua's Chinese website published an article titled 'Methods of measuring penis length':?? The penis is an important part of the male reproductive organ, and it very important to men. In ancient times, the penis appeared on stone totems expressing the adoration humans feel toward the penis. The size of the penis varies between races and individuals. The unerect penises of Chinese men (aged 18 to 45) are between 4.5 and 8.8 centimeters (1.6 to 3.5 inches) long, with the average length being 6.5 centimeters (2.5 inches). http://www.danwei.org/media_and_advertising/the_length_of_a_chinese_penis.php
 Dimensiones peneanas en la población venezolana [PDF] DIMENSIONES PENEANAS EN LA POBLACIÓN VENEZOLANA DIMENSIONES ... [new window] File Format: PDF/Adobe Acrobat - View as HTML Vol. 47 ENER04UNIO, 2001. DIMENSIONES PENEANAS EN LA POBLACIÓN. VENEZOLANA. Dres. Ricardo Szemat N., Teodoro Sucre, Yajaira Contreras, José M. Marín, ... [revista venezolana de urología] www.soveuro.org.ve/svunuevo/revistas/Vol-enero-junio2001/3.pdf - Similar pages - Filter
 Urology. 2002 Sep;60(3):485-9; discussion 490-1.Click here to read Links Comment in: Urology. 2003 Jul;62(1):201. Size of external genital organs and somatometric parameters among physically normal men younger than 40 years old. Spyropoulos E, Borousas D, Mavrikos S, Dellis A, Bourounis M, Athanasiadis S.
 Chen J, Gefen A, Greenstein A, Matzkin H, Elad D (2000). "Predicting penile size during erection". Int. J. Impot. Res. 12 (6): 328–33. doi:10.1038/sj.ijir.3900627. PMID 11416836.
 A study conducted by LifeStyles Condoms found an average of 14.9 cm (5.9 in) with a standard deviation of 2.1 cm (0.8 in) (measured by staff). The purpose of this study was to ensure properly sized condoms were available. 401 college students volunteered to be measured during 2001 Spring Break in Cancún, Mexico, of which 300 gained an erection to be clinically measured (without pharmacological aid). The 300 effective measurements makes this study double the size of any prior study that uses medical staff to measure penis size. http://en.wikipedia.org/wiki/Human_penis_size
 1: Int J Impot Res. 2005 Mar-Apr;17(2):191-5.Click here to read Links Penile measurements in normal adult Jordanians and in patients with erectile dysfunction. Awwad Z, Abu-Hijleh M, Basri S, Shegam N, Murshidi M, Ajlouni K. Department of Urology, Jordan University Hospital, Amman, Jordan. email@example.com
 1: Arch Sex Behav. 2002 Aug;31(4):351-7.Click here to read Links Comment in: Arch Sex Behav. 2003 Apr;32(2):91-2. Test-retest reliability of the measurement of penile dimensions in a sample of gay men.
 Int J Impot Res. 2007 Nov-Dec;19(6):558-63. Epub 2007 Jun 14.Click here to read Links Penile length and circumference: an Indian study. Promodu K, Shanmughadas KV, Bhat S, Nair KR.
 Does average human penis length vary among ethnic groups? http://www.straightdope.com/classics/a2_193.html [kinsey data] White males had an average flaccid penis length of 4.0 inches, whereas the average black male's detumescent member measured 4.3 inches. But when erect, the average white penis was 6.2 inches long, whereas the average black's was 6.3 inches--still longer, but not by much. (Average circumference for whites was 3.7 inches; for blacks, 3.8.)
 Acuña A, Villalba J, Estudio Antropométrico del Pene. Urol. Colombiana 1999; 2:35-42. http://encolombia.com/medicina/revistas-medicas/urologia/vol-8299/urologia8299-estudio/ http://encolombia.com/medicina/revistas-medicas/urologia/vol-8299/urologia8299-estudio2/
 Chrouser et al. Penile Measurements in Rural Tanzanian Males: Informing Male Circumcision Device Design. 2013. http://pag.aids2012.org/abstracts.aspx?aid=10259
 Establishing a reference range for penile length in Caucasian British men: a prospective study of 609 men. 2011 BJU INTERNATIONAL | 109 , 740 – 744 | doi:10.1111/j.1464-410X.2011.10338.x
 Herbenick et al. Erect Penile Length and Circumference Dimensions of 1,661 Sexually Active Men in the United States. J Sex Med 2014;11:93–101
 Growth and Development of Male External Genitalia A Cross-sectional Study of 6200 Males Aged 0 to 19 Years Analia Tomova, MD, PhD; Fnu Deepinder, MD; Ralitsa Robeva, MD; Hristina Lalabonova, MD, PhD; Philip Kumanov, MD, PhD; Ashok Agarwal, PhD, HCLD Setting: Schools, kindergartens, and child care centers in different parts of Bulgaria. http://ccf.org/reproductiveresearchcenter/docs/agradoc391.pdf
 Kamel I, Gadalla A, Ghanem H, and Oraby M. Comparing penile measurements in normal and erectile dysfunction subjects. J Sex Med 2009;6:2305–2310. http://onlinelibrary.wiley.com/doi/10.1111/j.1743-6109.2009.01305.x/abstract
 Habous, M., Tealab, A., Williamson, B., Binsaleh, S., El Dawy, S., Mahmoud, S., Abdelwahab, O., Nassar, M., Mulhall, J. P., Veale, D. and Muir, G. (2015), Erect Penile Dimensions in a Cohort of 778 Middle Eastern Men: Establishment of a Nomogram. Journal of Sexual Medicine. doi: 10.1111/jsm.12894 http://onlinelibrary.wiley.com/doi/10.1111/jsm.12894/abstract
 Second to fourth digit ratio: a predictor of adult penile length IH Choi, KH Kim, H Jung, SJ Yoon, SW Kim, TB Kim - Asian J Androl, 2011 - isdbweb.org http://www.isdbweb.org/documents/file/4e89b83606224.pdf
 Penile anthropometry in Brazilian child and adolescent PN Gabrich, JSP Vasconcelos, R Damião… - Jornal de …, 2007 - SciELO Brasil http://www.scielo.br/scielo.php?pid=S0021-75572007000600008&script=sci_arttext http://www.scielo.br/pdf/jped/v83n5/en_v83n5a08.pdf
 5.35 inches; Taiwan Sexual Dysfunction Advisory Council and Training, Taiwan: http://sdact.tand.org.tw/issue/issue_info.asp?issue_id=5
 Yoon JS, Lee GH, Chang DS. The Relationship between Height and Body Weight and Penile Size in University Students. Korean J Urol. 1998 Nov;39(11):1061-1064. Korean. http://www.koreamed.org/SearchBasic.php?RID=1020KJU/19220.127.116.111&DT=1
 Penile Nomogram in Korean Males http://pdf.medrang.co.kr/paper/pdf/Androl/Kjan016-02-06.pdf
 Da Ros C, Teloken C, Sogari P, Barcelos M, Silva G, Souto C, et al. Caucasian penis: What is the normal size? J Urol 1994; 151: 323A.