I'm 5'9", 140 pounds, athletic build. Ordered these in a small and a medium. Both pairs fit but the small was sort of stretched across my butt in an unflattering way. Medium was a better fit but I just cannot get into the way everyone wears their clothes so high waisted and baggy these days. Maybe I am too old for these, back they go! Fabric was super soft. Medium pair had no smell but the small had an extremely strong chemical odor.