Finding the perfect bra size ensures comfort, support, and a flattering fit. To measure correctly, you'll need a soft measuring tape and a mirror for accuracy.
Wrap the measuring tape around your ribcage, just under your bust. Make sure it’s snug but not too tight. This measurement is your band size. If using centimeters, our calculator will automatically convert to inches.
Place the tape around the fullest part of your bust, keeping it level around your body. This measurement is your bust size.
Subtract your band size from your bust size. The difference corresponds to your cup size (e.g., 1 inch = A cup, 2 inches = B cup, etc.). Our calculator does this for you instantly.
The bust measurement is the circumference around the fullest part of your chest, typically across your nipples.
The band measurement is the circumference around your ribcage, just under your bust. This number is the base of your bra size and determines the fit around your torso.