I am 5'1", 130 lbs, seven months pregnant and the size medium shorts fit perfectly. They are super comfortable and perfect for around the house. I bought them to go swimming in, the material seems like it will dry out fast. A couple things I didn't like. First, mine didn't have the cute design on the front of the shorts like in the picture. Second, when I tighten the strap on top, I have the long strap hanging down which is kind of awkward.