I ordered the small in this bottom and love it! I usually wear a size 4 (5'4'', 120lbs) and went with the small in accordance to the sizing chart. I was most interested in the bottom because of the foldover style. Though it comes tacked down, with a simple snip you have versatility (without any excess fabric)! There's no sag and the material seems durable. Everything stays put in the water and I expect it will last many years! Love it. My only complaint is that it's a slower dryer compared to some of my other suits.