Adjust Your Cups

Band size and cup size are interrelated, so if you go down a band size, you usually need to go up a cup to get the same volume. (For example, a 34B has the same amount of cuppage as a 32C.) Push against the underwire on the side of your bra, right under your armpit. You want it to press into your ribs, not delicate breast tissue—increase your cup if that's the case. Also, the center of the bra between the two cups should be flush against your sternum. If it's popping out, that's another sign you need a bigger cup.