I bought a medium. I usually wear a large, but I have no boobs and plenty of booty. The outfit has a lot of stretch. I weigh about 165 and 5’6”. The skirt came to my ankles. The top fit, but I had to put on a strapless push-up bra to make it not look so flat. If you have bigger boobs, it might not work for you.

Love this outfit. Bought for my bday weekend and fits great. I'm 5'9 197lbs and got a size large.