Penis Size
Your measurement against a meta-analysis of 15,521 men measured by clinicians, not self-report. Mean erect length is 13.12 cm with an SD of 1.66 cm.
The comparison data was measured by clinicians, not self-reported. Measure the same way: along the top, from the pubic bone to the tip.
You are longer than
50%
of men measured in Veale et al. (2015), n=15,521. Mean 13.12 cm, SD 1.66.
Only 1 in 2 men are longer than you. The clinically measured mean is 13.12 cm (5.17 in).
Global distribution: Erect length
The perception gap: Men tend to overestimate when self-reporting: the average self-reported length is about 14.15 cm, against a clinically measured average of 13.12 cm. This module uses the measured data.
In context
For scale: a chimpanzee averages about 8 cm erect, a gorilla about 3 to 4 cm despite weighing twice what a man does, and a blue whale around 2.5 to 3 m. Humans are the largest of the great apes on this measure relative to body size. Your 13.1 cm is within the human range, which already beats every other ape.
Advertisement
Look up a value: Is 14 cm normal? and other percentile lookups.
Related tests
About this test
The module compares a measurement to the largest clinical dataset available: Veale et al. (2015), BJU International, 15,521 men measured by health professionals. Erect length has mean 13.12 cm and SD 1.66; flaccid length 9.16 cm (SD 1.57); erect girth 11.66 cm (SD 1.10); flaccid girth 9.31 cm (SD 1.00).
The distribution is narrow. One SD on erect length is 1.66 cm, so 15 cm is already above about 87% of men and 16.5 cm above about 98%. Self-reported surveys run about 1 cm higher than measured ones, which is why this module uses clinician measurements only.
What is the average penis size?
Erect length averages 13.12 cm (5.17 in) and erect girth 11.66 cm (4.59 in), measured by clinicians in Veale et al. (2015), n=15,521. Flaccid length averages 9.16 cm. Self-reported averages are higher, about 14.15 cm, which says more about reporting than anatomy.
Is 15 cm big?
By the numbers, yes. 15 cm erect is about the 87th percentile (mean 13.12, SD 1.66). 17 cm is above about 99% of men.
Does size vary by region?
A little, and the regional samples are smaller and less consistent than the Veale data. The module's regional means run from 12.60 cm (South Asia) to 13.58 cm (North America), a spread of under 1 cm. The percentile uses the Veale SD of 1.66 for every region.
Percentiles above come from the same parameters the Penis Size module uses. See the methodology for how they are calculated.