I am 5'7", 155 lbs, pear-shaped and bought size S. I might buy another in a M because the sleeves were a bit tight and showed the outline of my sleeves of my shirt under it more than I liked. I got the teal. The material is thin, but it's great for any season if you like light layers. Sometimes I just want something lightweight to hide my hips. I haven't washed it yet, and will update if any issues.