I love this tank, the design on it. The reason I purchased it was because Dominic Thiem is wearing it right now. I wear a small which fits, but the sports bra inside isn't supportive enough- probably due to breast size. I'm afraid though if I ordered a medium, it would be too big, and I'd have no support at all. For tennis, I can play ball machine but in a real match- it's not enough support. I wear it for fun though and love it!!