I used to be a small, but I purchased this thigh slimmer in a medium. It pulled on easily just like reviews said, fits well, nice material, and legs and waist band didn't roll.  But it also didn't hold me in like other slimmers I've had before.  I still jiggle in all the wrong places (tummy and butt), didn't slim me down much. I think I'm between sizes.  Disappointed.