Bra Size Calculator
A U.S. bra size is made up of two measurements: band and cup. U.S. bra sizes are measured in inches. Determine your band size by measuring around your ribcage, where the band of your bra should rest. Round this measurement up to the nearest even number—29 to 30, 31 to 32, and so on—to get your band size. Then measure loosely around the fullest part of your bust. The difference between your band measurement and bust measurement dictates the letter of your bra cup size.