I am about 5' and have a large/xlarge bust, I got a small and it did fit well as far as cheek coverage and midsection. The top is a little more revealing than I though but it passed the shimmy test so the girls are fine :-) lol great suit definitely recommend!
It feels nice, fits great and looks like the picture. Im 5'8 and 155lbs and I got it in large. works well for my height but i imagine it'd be loose in width if I was lighter. I wish my boobs were bigger so I'd get a little more definition at the top, but still flattering.
This suit was very cute and good material, but unfortunately it was too revealing for me. I'm 5'4 and a 34D, and this did not have much boob coverage at all, so I had to return. If you have small boobs it would probably look a lot cuter on you! Just not for me because I like more coverage than 1/4 of my boobs.