I bought a large even though my height and weight put me in the medium size. When they say "Firm" control, they really mean it! They were really tight. Not uncomfortably so, but I bought them to smooth out postpartum love handles and saggy stomach skin and when you wear something that tight it cuts in where the waist line is and just gives you a new lump to have to hide. If the waist band had been thicker they might work better, or if I had bought an extra large. Maybe when I lose more of my baby fat they'll work better, but I was hoping for something to work now.