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Geographic variation in penis length

Studies have found variations in average erect penis length across different geographic regions and populations.

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Jan 24, 2026
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What are the typical distributions (percentiles) for erect penis length and girth in large measured datasets?

Large, clinician‑measured meta‑analyses place the typical around 13.1 cm (≈5.16 in) and erect girth (circumference) around 11.7 cm (≈4.6 in), with most men clustered within a few centimetres of those ...

Jan 6, 2026

What is the average erect penis size for adult age groups (18–29, 30–49, 50+)?

High-quality, investigator-measured studies converge on an average erect penile length of roughly 13 cm (about 5.1–5.2 inches) for adult men, but the peer‑reviewed literature rarely supplies robust, c...