I've danced and ran in this bra and it's the best and cheapest sports bra that I've ever purchased. I'm a 38DD and I ordered my exact size. What I also love is the fact that I can adjust the straps around my chest and over my shoulders. I plan to lose weight and I kn ow this bra will carry me through! It is tight at first but it stretches with wear so I suggest getting your original size. It's also very flattering which I don't really care about because I want to preserve my breasts as well as I can lol but it's very cute.