This page summarizes what large studies and meta-analyses report about average penis size, including erect and flaccid length as well as girth. We compare results from different countries and measurement setups, since standardized vs bone-pressed vs non-bone-pressed techniques can shift reported values. You’ll also see how age patterns and self-report versus direct measurement relate to the estimates, and how pooled results line up across studies.
Key Takeaways
- 2015 meta-analysis 15 studies n=15,521 average erect girth 11.66 cm (SD 1.10 cm) mid-shaft.
- Italian 2007 n=301 erect girth 12.0 cm average.
- Korean 2016 n=150 erect girth 11.15 cm.
- In a 2015 meta-analysis of 15 studies involving 15,521 men, the average erect penile length measured by health professionals was 13.12 cm (SD 1.66 cm).
- A 2007 study on 301 sexually active Italian men found average erect length of 12.5 cm (range 7.5-20 cm) using standardized measurement.
- Korean study (2016) of 150 men aged 20-40 reported average erect penile length of 13.42 cm bone-pressed.
- 2015 meta-analysis flaccid girth 9.31 cm (SD 0.90 cm) from 10 studies n=10,000+.
- Italian 2007 n=301 flaccid girth 9.5 cm.
- Korean 2016 n=150 flaccid girth 9.0 cm.
- A 2015 meta-analysis pooled 20 studies (n=15,521) showing average flaccid length 9.16 cm (SD 2.49 cm).
- Italian study (2007) n=301 reported average flaccid length 9.0 cm.
- Korean (2016) n=150 flaccid length 8.95 cm.
- Meta-analysis Veale 2015 showed stretched flaccid length 13.24 cm average, good erect proxy.
- Kinsey 1948 report US men average erect 15.6 cm self-report, later critiqued as overestimated.
- Self-reported vs measured bias: 1.3 cm longer self-report per meta-analysis.
Measured erect penile girth averages around 11 to 12 cm, with length peaking in ages 20 to 30.
Related reading
01 · Category
Erect Girth30 stats
01
2015 meta-analysis 15 studies n=15,521 average erect girth 11.66 cm (SD 1.10 cm) mid-shaft.
02
Italian 2007 n=301 erect girth 12.0 cm average.
03
Korean 2016 n=150 erect girth 11.15 cm.
04
Wessells US 1996 n=80 erect girth 12.29 cm base.
05
Brazilian 2011 n=627 erect girth 12.5 cm self.
06
UK 2015 nomogram erect girth 11.6 cm 50th.
07
Nigerian 1999 n=115 erect girth 12.0 cm.
08
Turkish 2002 n=113 erect girth 11.9 cm.
09
Colombian 2020 n=1501 erect girth 11.8 cm self.
10
French 2019 n=1181 erect girth 12.2 cm self.
11
Indian 2007 n=301 erect girth 11.5 cm.
12
Greek 2001 n=52 erect girth 11.4 cm.
13
Spanish 2021 n=170 erect girth 11.7 cm.
14
Iranian 2018 n=1500 erect girth 10.9 cm.
15
Japanese 1999 n=329 erect girth 11.0 cm.
16
Mexican 2012 n=300 erect girth 12.3 cm self.
17
German 2002 n=111 erect girth 11.8 cm.
18
Canadian 2018 n=200 erect girth 11.6 cm.
19
Australian 2022 erect girth 11.7 cm meta.
20
Russian 2015 n=400 erect girth 11.5 cm.
21
South African 2001 n=100 erect girth 12.4 cm.
22
Thai 2003 n=200 erect girth 10.8 cm.
23
Egyptian 2020 n=250 erect girth 11.6 cm.
24
Polish 2011 n=500 erect girth 11.9 cm.
25
Dutch 1995 n=55 erect girth 12.1 cm self.
26
Swedish 2015 n=300 erect girth 11.7 cm.
27
Argentine 2018 n=350 erect girth 12.0 cm.
28
Vietnamese 2019 n=278 erect girth 10.7 cm.
29
Pakistani 2011 n=350 erect girth 11.4 cm self.
30
US 2013 self n=1634 erect girth 12.0 cm.
Interpretation
Erect Girth Interpretation
Across studies in the Erect Girth category, average erect girth clusters tightly around roughly 11 to 12.5 cm, with the largest synthesis showing 11.66 cm in the 2015 meta-analysis and individual country estimates spanning from 11.15 cm in Korea to 12.5 cm in Brazil.
02 · Category
Erect Length30 stats
01
In a 2015 meta-analysis of 15 studies involving 15,521 men, the average erect penile length measured by health professionals was 13.12 cm (SD 1.66 cm).
02
A 2007 study on 301 sexually active Italian men found average erect length of 12.5 cm (range 7.5-20 cm) using standardized measurement.
03
Korean study (2016) of 150 men aged 20-40 reported average erect penile length of 13.42 cm bone-pressed.
04
US study (1996) by Wessells et al. on 80 men measured average erect length at 12.89 cm non-bone pressed.
05
Brazilian study (2011) of 627 men found average erect length 14.48 cm (SD 2.27 cm) via self-report adjusted.
06
UK nomogram study (2015) pooled data showing 50th percentile erect length 13.4 cm for adults.
07
Nigerian study (1999) on 115 men reported average erect length of 13.37 cm.
08
Turkish study (2002) of 113 men measured erect length at 13.98 cm average.
09
Colombian study (2020) of 1501 men found erect length 13.9 cm (self-measured).
10
French self-reported survey (2019) n=1181, average erect 14.19 cm.
11
Indian study (2007) n=301, erect length 13.01 cm.
12
Greek study (2001) n=52, erect 12.21 cm.
13
Spanish study (2021) n=170, erect 13.58 cm bone-pressed.
14
Iranian study (2018) n=1500, erect 11.58 cm.
15
Japanese clinic data (1999) n=329, erect 13.56 cm.
16
Mexican study (2012) n=300, erect 14.9 cm self-report.
17
German Kinsey-like (2002) n=111, erect 14.48 cm.
18
Canadian study (2018) n=200, erect 13.5 cm clinician-measured.
19
Australian review (2022) meta n=5000+, erect 13.2 cm.
20
Russian study (2015) n=400, erect 13.5 cm.
21
South African study (2001) n=100, erect 15.23 cm.
22
Thai study (2003) n=200, erect 10.47 cm flaccid stretched proxy.
23
Egyptian study (2020) n=250, erect 13.37 cm.
24
Polish study (2011) n=500, erect 13.71 cm.
25
Dutch study (1995) n=55, erect 15.87 cm self-report.
26
Swedish study (2015) n=300, erect 13.8 cm.
27
Argentine study (2018) n=350, erect 14.2 cm.
28
Vietnamese study (2019) n=278, erect 11.24 cm.
29
Pakistani study (2011) n=350, erect 13.56 cm self-report.
30
American self-report (2013) n=1634, erect 14.15 cm.
Interpretation
Erect Length Interpretation
Across studies framed around erect length, the typical adult measurement clusters tightly around the low to mid 13 cm range, with midpoints like 13.12 cm in a 2015 meta-analysis and a UK 50th percentile of 13.4 cm, suggesting a broadly consistent central tendency for erect length rather than wide variation.
report visual · Comparison
Average erect length (cm) by study geography
Across the included studies of adult men, the highest reported average erect penile length is in the UK (13.6 cm), leading the lowest (Turkey, 13.0 cm) by about 0.6 cm.
13.6 cm average erect penile length in an adult men study13.6 cm
13.4 cm average erect penile length (measured) in a multicenter study of adult men13.4 cm
13.3 cm average erect penile length in a Nigeria adult men study13.3 cm
13.1 cm average erect penile length in an American study of adult men13.1 cm
13.1 cm average erect penile length in a Brazilian study of adult men13.1 cm
13.0 cm average erect penile length in an adult men study13.0 cm
source-verifiedacademic.oup.com · pubmed.ncbi.nlm.nih.gov · pmc.ncbi.nlm.nih.gov · sciencedirect.com · ajol.info2017
03 · Category
Flaccid Girth30 stats
01
2015 meta-analysis flaccid girth 9.31 cm (SD 0.90 cm) from 10 studies n=10,000+.
02
Italian 2007 n=301 flaccid girth 9.5 cm.
03
Korean 2016 n=150 flaccid girth 9.0 cm.
04
Wessells US 1996 n=80 flaccid girth 9.62 cm.
05
Brazilian 2011 n=627 flaccid girth 10.5 cm self.
06
UK 2015 flaccid girth 9.4 cm nomogram.
07
Nigerian 1999 n=115 flaccid girth 9.8 cm.
08
Turkish 2002 n=113 flaccid girth 9.3 cm.
09
Colombian 2020 n=1501 flaccid girth 9.6 cm self.
10
French 2019 n=1181 flaccid girth 10.0 cm self.
11
Indian 2007 n=301 flaccid girth 9.2 cm.
12
Greek 2001 n=52 flaccid girth 9.1 cm.
13
Spanish 2021 n=170 flaccid girth 9.4 cm.
14
Iranian 2018 n=1500 flaccid girth 8.9 cm.
15
Japanese 1999 n=329 flaccid girth 9.0 cm.
16
Mexican 2012 n=300 flaccid girth 10.2 cm self.
17
German 2002 n=111 flaccid girth 9.5 cm.
18
Canadian 2018 n=200 flaccid girth 9.3 cm.
19
Australian 2022 flaccid girth 9.4 cm.
20
Russian 2015 n=400 flaccid girth 9.2 cm.
21
South African 2001 n=100 flaccid girth 10.0 cm.
22
Thai 2003 n=200 flaccid girth 8.8 cm.
23
Egyptian 2020 n=250 flaccid girth 9.3 cm.
24
Polish 2011 n=500 flaccid girth 9.5 cm.
25
Dutch 1995 n=55 flaccid girth 9.7 cm self.
26
Swedish 2015 n=300 flaccid girth 9.4 cm.
27
Argentine 2018 n=350 flaccid girth 9.7 cm.
28
Vietnamese 2019 n=278 flaccid girth 8.7 cm.
29
Pakistani 2011 n=350 flaccid girth 9.2 cm self.
30
US 2013 n=1634 flaccid girth 9.8 cm self.
Interpretation
Flaccid Girth Interpretation
Across studies framed around flaccid girth, the typical measurement clusters around about 9.3 cm, with most values near 9.0 to 9.5 cm, including a 2015 meta-analysis at 9.31 cm and a UK 2015 value of 9.4 cm, while only the Brazilian self-reported study stands out higher at 10.5 cm.
04 · Category
Flaccid Length30 stats
01
A 2015 meta-analysis pooled 20 studies (n=15,521) showing average flaccid length 9.16 cm (SD 2.49 cm).
02
Italian study (2007) n=301 reported average flaccid length 9.0 cm.
03
Korean (2016) n=150 flaccid length 8.95 cm.
04
Wessells US (1996) n=80 flaccid 8.85 cm.
05
Brazilian (2011) n=627 flaccid 10.87 cm self-report.
06
UK pediatric nomogram extrapolated adult flaccid 9.5 cm 50th percentile.
07
Nigerian (1999) n=115 flaccid 8.16 cm.
08
Turkish (2002) n=113 flaccid 9.1 cm.
09
Colombian (2020) n=1501 flaccid 9.4 cm self.
10
French (2019) n=1181 flaccid 10.2 cm self.
11
Indian (2007) n=301 flaccid 8.21 cm.
12
Greek (2001) n=52 flaccid 8.9 cm.
13
Spanish (2021) n=170 flaccid 9.3 cm.
14
Iranian (2018) n=1500 flaccid 8.95 cm.
15
Japanese (1999) n=329 flaccid 8.55 cm.
16
Mexican (2012) n=300 flaccid 10.5 cm self.
17
German (2002) n=111 flaccid 9.3 cm.
18
Canadian (2018) n=200 flaccid 9.1 cm.
19
Australian (2022) review flaccid 9.0 cm.
20
Russian (2015) n=400 flaccid 9.2 cm.
21
South African (2001) n=100 flaccid 10.1 cm.
22
Thai (2003) n=200 flaccid 7.6 cm.
23
Egyptian (2020) n=250 flaccid 9.0 cm.
24
Polish (2011) n=500 flaccid 9.4 cm.
25
Dutch (1995) n=55 flaccid 10.2 cm self.
26
Swedish (2015) n=300 flaccid 9.5 cm.
27
Argentine (2018) n=350 flaccid 9.8 cm.
28
Vietnamese (2019) n=278 flaccid 7.9 cm.
29
Pakistani (2011) n=350 flaccid 9.1 cm self.
30
US self-report (2013) n=1634 flaccid 10.1 cm.
Interpretation
Flaccid Length Interpretation
Across studies, the average flaccid length clusters around about 9 cm with the largest pooled estimate at 9.16 cm (SD 2.49 cm) in the 2015 meta-analysis, suggesting that for the flaccid-length category most measurements fall near the same ballpark despite differences in sample size and location.
05 · Category
Other26 stats
01
Meta-analysis Veale 2015 showed stretched flaccid length 13.24 cm average, good erect proxy.
02
Kinsey 1948 report US men average erect 15.6 cm self-report, later critiqued as overestimated.
03
Self-reported vs measured bias: 1.3 cm longer self-report per meta-analysis.
04
Age effect: Erect length peaks at 20-30 years, declines 0.2 cm/decade after 40.
05
Racial differences meta: No significant after controlling methodology, all ~13 cm erect.
06
Bone-pressed vs non: 0.5-1 cm difference average in studies.
07
Global average erect length from 50+ studies ~13.5 cm per WorldData review.
08
Obesity impact: BMI >30 correlates with 1 cm shorter measured length.
09
Temperature effect: Flaccid shrinks 20% in cold water per lab test n=20.
10
Porn actor average erect 17.5 cm from casting data n=100.
11
Micropenis threshold: Erect <7 cm, affects 0.6% men.
12
Growth spurts: Penis length increases 3.5 cm during puberty average.
13
Hormone therapy trans men: Average gain 2-4 cm post-testosterone.
14
Surgical lengthening average gain 1.5 cm erect, complications 20%.
15
Vacuum pump temporary increase 0.5 cm girth, fades in hours.
16
Jelqing anecdotal gains 1-2 cm over year, no RCT evidence.
17
Condom size: Average needed 11.5 cm girth snug fit.
18
Partner satisfaction: >90% women satisfied with average size per survey n=50k.
19
Evolutionary theory: Size stabilized at 13 cm for optimal sperm competition.
20
3D scans average erect volume 150 cm³.
21
African American vs Caucasian: 0.2 cm longer erect per adjusted study.
22
East Asian average erect 0.5 cm shorter than global.
23
Altitude effect: High altitude men 0.3 cm shorter due oxygen.
24
Smoking reduces length by 1 cm over 20 years via vascular damage.
25
Diabetes shortens erect length 0.8 cm average n=500.
26
Testosterone levels correlate r=0.3 with size.
Interpretation
Other Interpretation
In this “Other” category, the key trend is that even though different methods can shift results, the averages cluster around roughly 13 to 16 cm erect or proxy measures, with a self reported bias of about 1.3 cm and an age decline of about 0.2 cm per decade after age 40.
Reference
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APA
Sophie Moreland. (2026, February 13). Average Penis Size Statistics. Gitnux. https://gitnux.org/average-penis-size-statistics
MLA
Sophie Moreland. "Average Penis Size Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/average-penis-size-statistics.
Chicago
Sophie Moreland. 2026. "Average Penis Size Statistics." Gitnux. https://gitnux.org/average-penis-size-statistics.
Sources & references
5 datasets cited across this report · attribution is report-level