I'm a 36dd, and ordered the 38d. I would say this is good for very light exercise. I was just walking on the treadmill today and there was a lot of bounce. But for under a t shirt in the summer it would be good. The seem lines that people are talking about are just seems, but I can see where some people wouldn't like them. But at the gym it's not a big deal. I'm probably going to try to,avoid wearing this bra to the gym again however because the stitching under the boobs gets really itchy and uncomfortable when you sweat. So, bottom line, for larger chested girls this doesn't provide any more support than a regular bra, but its more comfortable for everyday. Not good for gym.