I am usually a size XL-1X HOWEVER, this runs small the jeans has absolutely no stretch. I am plus size so I am curvy with hips, butt and a Lil stomach so if you are my size I would size up, if your stomach is flat a 1x should do fine. It’s a really Cute set however another problem is when ordering these items the bottoms could run bigger than the top so keep that in mind. I have bought a set from here before and the bottoms were huge and saggy.