Underwear Size Calculator
Find your underwear size in US, EU, and UK
Measure around your natural waistline and the fullest part of your hips.
How to Measure for Underwear
1
Measure your waist
Wrap a soft measuring tape around your natural waistline, the narrowest part of your torso about an inch above your belly button. Keep the tape level and snug but not tight.
2
Measure your hips
Wrap the tape around the fullest part of your hips and buttocks. Stand with your feet together and keep the tape parallel to the floor. Don't pull too tight.
Frequently Asked Questions
Wrap a measuring tape around your natural waistline, the narrowest part of your torso, about an inch above your belly button. Keep the tape level and snug but not tight.
Size up for comfort. Underwear that's too tight is uncomfortable and can cause skin irritation. A slightly looser fit is always better than too snug.
No. Men's underwear is primarily sized by waist measurement (S=28-30", M=32-34", L=36-38"). Women's underwear uses hip measurements more heavily and includes more size gradations (XS through XXL, or numbered sizes 4-10).
Not always. While most brands follow standard sizing, fit can vary based on the style (briefs vs boxers vs bikini) and the brand's target fit. Calvin Klein tends to run true, while athletic brands may run slightly smaller.