I’m usually a size small. 5’5” & 125lbs but I have a long torso. I bought this in a Medium. It fit perfectly, it even has a little extra room, but it is cut so close to the body, you won’t notice. The design is high cut and has pretty decent butt coverage. I used to despise hight cut swimsuits, but I’m into this one because it makes my legs look longer. I finally found a black one piece I can keep and feel good in. ??