Does penis size matter to women?
No — size matters far less than most men assume. In studies, women's preferred erect length for a long-term partner is about 16.0 cm (6.3 in), only slightly above the 13.1 cm (5.2 in) average, and most women report being satisfied with their partner's size.
No — far less than the panic in your head insists. The cleanest evidence comes from a study where women picked from 3D-printed models (Prause, 2015). For a long-term partner they chose about 6.3 inches (16.0 cm) long and 4.8 inches (12.2 cm) around — a whisker above the population average of 5.16 inches (13.12 cm) erect. The “ideal” they describe is basically where most men already stand.
The same study flagged something men sprint right past: girth pulled at least as much weight as length. If you insist on worrying about one dimension, pick that one. It’s the better bet, and it’s the one a ruler can’t read off at a glance. Here’s what women actually prefer when you ask them straight.
Now watch the anxiety deflate. The preference target sits barely above average, so the typical man already clears the bar. And clinically defined micropenis — under about 3.7 inches (9.3 cm) stretched — hits roughly 0.6% of men. The fear sprints way out ahead of the math. About 90% of men land between 4.1 and 6.2 inches (10.4–15.9 cm) erect, and a 5-inch erection sits near the 40th percentile. Squarely, unremarkably normal.
Read what the research actually says in does size matter, and why girth vs length is the smarter question.
See exactly where you land: Use the penis size calculator →