What is the most common penis size?
The most common erect penis size is about 13.1 cm (5.2 inches) long and 11.7 cm (4.6 inches) around, based on clinician measurements of more than 15,000 men.
The most common erect size lands dead center: about 13.1 cm (5.2 inches) long and 11.7 cm (4.6 inches) around. Those numbers come from Veale et al. (2015, BJU International) — the biggest clinician-measured study ever run, pooling 15,521 men. Not survey guesses. Real rulers, real hands.
“Most common” isn’t a fudge here. The distribution spikes hard at the middle instead of sprawling out. Walk the percentiles and watch how tightly everything clusters:
- 5th percentile: 10.4 cm (4.1 in)
- 25th percentile: 12.0 cm (4.7 in)
- 50th / median: 13.1 cm (5.2 in)
- 75th percentile: 14.2 cm (5.6 in)
- 95th percentile: 15.9 cm (6.2 in)
Half of all men live inside a 2.2 cm window — 12.0 to 14.2 cm. In inches: 5 sits near the 40th percentile, 5.5 around the 70th, 6 at roughly the 90th. So “common” and “average” are the same answer wearing two hats.
Here’s the part people get backwards: they assume the common size is the unwanted one. Dead wrong. When partner-preference studies pin down an “ideal,” it sits barely above this average, and girth pulls as much weight as length. The median measurement is, by the numbers, almost exactly what women prefer.
Want to see precisely where a measurement lands? Check the full penis size statistics or read is 5 inches normal?.