What is the average girth?
The average erect girth (circumference) is 11.66 cm (4.59 in), per Veale et al. 2015. Most men land between about 10 and 13 cm around.
Average erect girth — the circumference around the thickest part of the shaft — is 11.66 cm (4.59 inches). Same clinician-measured review that gave us the length numbers (Veale et al., 2015), so the figure is solid. Flaccid girth averages 9.31 cm (3.66 in). Most erect measurements land between 10.0 and 13.3 cm (3.9–5.2 in).
Here’s the twist most charts miss: girth is bunched tighter than length. The data crowds hard around the mean, so a half-centimetre that barely moves the needle on the length scale can swing your girth percentile noticeably. Small numbers punch above their weight here.
Girth is also the dimension that actually decides condom fit — measuring it is practical, not vanity. Wrap a flexible tape around the thickest part of the erect shaft and read where it meets. Done.
See girth vs length, check how rare your size really is, or dig into the full statistics.