A lot of reviews say this runs small but I think it’s actually tts, if you are not large up top. It’s very stretchy - I am normally a medium, sometimes a small, and I sized up to a large based on reviews. I am returning it for a medium, I could probably do a small too. I’m normally a US dress size 6, roughly a 32C. The dress is super cute, I love the built in shorts - note they are very particular about returns, so keep the original packaging and all tags until you’re sure it’s the right size! Def get the dress though, in general I’ve found the quality of their stuff to be solid.