Breast size 44dd. Acctim 6. So fast. Ann Summers 1. Pure Lace. Your bra should stay in place when you lift your arms or bend over. Ann Summers 1. Black, Nude, Pearl, Raspberry Sizes: Keep the tape measure level around your body and measure the fullest part of your breasts over your nipples. If the tape measure shows an odd number, round up to the next even number to get your band size.