I'm a 36ddd, so I got the 40 and it was fine. I don't believe it is meant for support or lift, but it's better than not wearing anything at all. But as others have said, the lace is very irritating, and the front hooks are hard to get to due to the lace being in the way. I was so excited to get it, hoping for something comfortable, but although the part that cups the breasts are comfy and stretchy, the lace is so irritating, even after 3 washes. It did soften up a bit, but not enough.