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Volunteer Bias in Penile Length Studies

The impact of volunteer bias on penile length study results.

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Jan 12, 2026
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What scientific studies establish average penis size and debunk common myths about predictors like shoe or hand size?

Large, peer-reviewed syntheses place the average erect human penis in the 5.1–5.5 inch (≈13–14 cm) range and show that many popular predictors—shoe size, hand size, or height—do not reliably forecast ...

Jan 11, 2026

What is the global average erect penis length according to recent studies?

Recent large meta-analyses that pooled investigator-measured data place the global average erect penile length at roughly 13.8–13.9 cm (about 5.4–5.5 inches), while regional and methodologic differenc...