Fajas are meant to be tight. I'm 5'9", and a very curvy size 12 (very fitted size 12) and medium fits me. If you're looking for good firm compression this is it. Even after 1 week of wearing this @3 weeks post op tummy tuck , I feel I can either alter this or buy size small even with thick thighs (current measurements 36, 29, 48). Amazingly the buttocks adjust to your size.