I have bras in a number sizes in my arsenal 32D, 32DD, 34D, 34C... I'm all over the map. I've been wearing a 32DD in this bra but put on a few pounds and figured the 34D would give me a little extra room to move. It fits perfectly. I would order 5 more if the seams weren't so obvious through my shirts. This is the one and only flaw with this bra. I also have the betsey johnson zipper stripe bra, which is ok, but this one has a much nicer, stronger structure to it.