I bought this dress in a small. I did gain a few pounds so now the medium would have fit better. I ended up wearing it as a pencil skirt which worked out great! It fit as a dress, but very tight. If I was going to wear as a dress again I would get a size medium. I am 152 lbs. and 5’1 ish. I have a booty and a little gut. LOL My IG is @food__health_fashion if you would like to see for reference and the pic is part of my Maui/Hawaii pics.