I am pleasantly surprised at these leggings. They are super comfy, soft, and I love the sublte butt scrunch. I'm 5'3" and weigh 120 lbs. I normally fit a size small in majority of clothes. I feel that size small leggings that I've tried were way too tight around my waist, but perfect around my thighs/legs. I sized up and bought these in medium and they fit perfectly. I'm able to breathe and move in them very well. These are my favorite leggings now and I ended up buying more colors :)