Amazing pair of leggings! I'm 5'9, 145 lbs with an athletic build. The medium was perfect! No show when doing squats or deadlifts at the gym, very very mild pantylines, and long enough for my long legs...stops at my ankles. Ordered the black medium first, then I ordered the dark blue medium and the ruby wine red in large. Large was too big and I kept having to pull my pants up. The quality stays in tact, no shrink after a few washes and pet hair comes out easily with a lint brush. Material doesn't bunch up like most leggings do. My favorite pair of leggings...will definitely buy more!