As mentioned by others, the fit on these leggings are a little funky. I am a size 10 and the medium fit perfect everywhere...but behind the knees. Seriously, the fabric gets weird and slouchy right by the knees. I was looking for a snug fit across the board so these just didn't do it for me. If you are looking for a bit looser tights, these might be the ones for you. Size in the waist worked well for me, just not the excess fabric behind the knees.