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Regional penis length patterns

Studies on regional patterns of penis length, including differences in mean lengths across geographic regions.

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Jan 23, 2026
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How large is normal variation in erect penis length among adults?

Population studies and systematic reviews put the average erect adult penis length at roughly (about 13–14 cm) with most high-quality measurement studies clustering near 13.1–13.9 cm, but measurement ...

Feb 6, 2026

Does breast size correlate to vaginal size

There is no reputable evidence that larger breasts predict a larger vagina; four decades of anatomical and clinical research find at best weak, indirect links between overall body size and vaginal dim...