Fitting your Dreamgirl bra or corset: Standing in front of a mirror, wrap your tape measure snugly around your chest, just under or at the crease beneath your breasts and flush against your back. Check in the mirror to make sure the tape measure is parallel to the floor and flat across your back. If the number is even add 4 to get your band size If the number is odd, add 5 to get your band size. Example: If you wrote down 32, add 4 and your band size will be 36, this will also be your corset size. If you have a DD cup size or above you should go one size larger.