I’m small but my bottom is big . I weigh 144 I’m Slim thick so I would’ve needed a medium.

So I purchased this for my trip to france. In person it’s cute looks exactly like the picture. I brought a medium but I could’ve gotten a size Small. While o was swimming the straps on the top kept coming loose. It’s adjustable like a bra but poorly made. I had to keep fixing the top every two minutes. I’m a 34C for reference.