Condom size finder

Why fit matters

It’s not just comfort. In a study of 436 men, those who said their condoms didn’t fit well were about 2.6 times as likely to report breakage and 2.7 times as likely to report slipping, and more likely to have irritation and to lose their erection.¹ Another study, of 3,658 condoms, found breakage went up as girth went up.²

Fitted condoms aren’t magic, though: in a trial of 820 men, fitted condoms broke half as often as standard ones, but some men in the middle sizes found they slipped a little more.³ If one width slips, try the next size down; if it’s tight or breaks, go up.

How to read the box

• Nominal width is the condom’s flat width in millimetres. Double it and you get roughly the condom’s circumference before stretching.⁴
• A good fit is slightly tighter than your girth, so it stays put without squeezing.⁴
• A “standard” condom is about 52–53 mm wide; the WHO’s standard widths are 49 mm and 53 mm.^4,5
• Length is rarely the problem. Standard condoms are about 18 cm (7 in) long, well over the average erect length of 13.1 cm (5.2 in); any extra just stays rolled at the base.⁴ (See average size.)

The chart behind the finder

There’s no official medical chart for this. These bands follow the fit guide published by Condomerie, a condom retailer, and match the “slightly tighter than your girth” rule.⁶ The average erect girth of 11.7 cm (4.6 in) lands in the regular band.