I'm typically a 36D (small D) or 38C (larger C), but since sports bras typically run small I ordered a 38D. It's nearly too snug in the band on the last hooks. Definitely too small in the cup. I'm spilling out the top and sides. Yes, I understand the mechanics of compression. This is just poor sizing. It shouldn't take a crystal ball to buy a bra, people. Still, I was optimistic and ordered another, up a cup size. It's better. As for design, other reviewers aren't kidding when they say it's tough to get into this thing. It rolls up and has to be unwound to get to the clasps. The bottom band also flips up in the front, which could likely be remedied by making the band slightly wider. The band rolling might not be a problem for more slender gals, but this size 16 girl had to adjust the band about 10 times in an hour-long workout. Not cool. All in all, this is still one of the better options in a strong motion-control racerback; hopefully the design will continue to evolve. For context: I also have the Moving Comfort Fiona, which is a good choice for light activities like weight training, yoga, and walking. The Juno does a much better job of controlling bounce (I use it for running and cross training), thanks to firmer inner mesh, deeper cups that come up higher on the chest, and the racerback shape.