This super cute tank runs oversized. So this medium will easily fit a womens Large, XL and possibly a 2X if you have smaller breasts or narrower shoulders. Very stretchy and soft. This is a longer style top that will cover your butt and will look great with leggings. Can easily be worn as a bathing suit cover up if you are a typical womens medium or smaller. Will fit more like a top if you are a Lg, Xl or 2x. Willing to bundle, just ask!