How to Find Your Bra Size
Bra sizes are made up of 2 components: a number that represents your band size, and a letter that indicates your cup size.
To find your size, you will need a soft tape measure. Measure while wearing a well fitting, non-padded bra.
To determine your band size: Wrap the tape measure around your ribcage, under your breasts, where the band of the bra would sit. Make sure the tape is snug, but not uncomfortable. Round down to the nearest whole number. If the number is even, add 2". If the number is odd, add 3". This is your band size.
To determine your cup size: Wrap the tape measure around the fullest part of your bust. Make sure the tape is level, and should be loose enough to take a deep breath comfortably. Round up to the nearest whole number. Subtract your band size from this number to find your cup size. 1" = A, 2" = B, 3" = C, 4" = D, 5" = DD, 6” = DDD.
Example: If your ribcage measurement is 32", and your bust measurement is 37", your bra size is a 34C: 32+2=34, so your band size is 34. Since 37-34= 3, your cup size is C.
Sister sizes:If you are in between sizes or you are having difficulty finding the correct fit, try this: go up in cup size and come down in band size OR Go up in band size and come down in cup size. For example, if you are wearing a 34C, but it is a little too snug around the band, try moving up to a 36 band and down to a B cup.
Hips:Stand with feet together, keep tape parallel to the floor. Measure around fullest part of seat.