STEP 1: BAND SIZE
While wearing a lightly lined non-push-up bra, wrap a measuring tape straight across your back and directly under your breasts. This measurement is your band size.
STEP 2: BUST SIZE
Place the tape around the fullest part of your bust, straight across your back so it’s parallel to the floor.
STEP 3: CUP SIZE
Subtract your band size from your bust size. Every inch equals one cup size--1” = A, 2” = B, 3” = C, 4” = D, 5” = DD and so on.
STEP 4: BRA SIZE
Combine your band size from step 1 with your cup size from step 3. This is your perfect bra size.