Period underwear size by hip measurement

Period underwear is sized on your hip, and every brand draws its own chart - so the same hip is a different size at different brands. Pick your hip measurement to see your size at each one.

From each brand's own published chart · Updated 2026-06-05

Don't know your hip measurement?

Take a soft tape around the fullest part of your hips and seat, level with the floor. That one number is what every brand's chart reads. Or let the size finder do it - it returns your size at every brand at once, in your browser.

Get the exact answer for your measurement

One hip measurement returns your size at every brand at once, with the runs-small and runs-large notes built in - computed in your browser, never sent anywhere.

Find my size Compare brands in mL