LOVE these leggings! Bought 2 in a week. The first pair were size medium (black). Fits well, maybe even a bit large. They were super comfortable didn't quite stay up as much as I wanted. Also, I'm an advocate for dri-wicking material because i sweat a lot and sometimes if i wear cotton, it just looks like I peed myself (probably TMI).... all that to say, these are amazing and dont show sweat hardly at all. They actually cooled a little. They are not see thru when squatting either! Bought a second pair in small (maroon).... LOVE! Perfect to lounge, workout, dress up with a tunic and boots or down with a hoodie and sneakers. I think I prefer the smalls over the medium's. I am 5' 6", 160lbs, jeans and dress pants size 7/8. I lift heavy weights and hardly do any cardio (not crossfit).