Studies On Penis Size
While results vary slightly across reputable studies, the consensus is that the mean human penis is in the range 12.9–15 cm (5.1–5.9 in) in length with a 95% confidence interval of (10.7 cm, 19.1 cm) (or, equivalently, 4.23 in, 7.53 in) — that is, it is 95% certain that the true mean is at least 10.7 cm but not more than 19.1 cm.
Another reputable source claims that the relaxed (flaccid, non-tumescent) human penis has an average length of only 4 inches (10 cm) and a diameter of 1.25 inches (3.2 cm) (which would result in a circumference of roughly 3.9 inches (9.9 cm) while fully erect ones have an average length of 6 inches (15 cm) and a diameter of 1.5 inches (3.8 cm), resulting in an erect circumference of 4.71 inches (12.0 cm).
The mean penis size is slightly greater than the median size.
Read more about this topic: Human Penis Size/Archive 2
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