This legging is a bit tight. I am supposed to buy size XS, but I purchased XXS. It fits me ok but a bit tight. I didn't return it because the martial is great, not show my lines of the underwear, and not very thin. My most of the leggings show my underwear clearly. The smaller size makes me control my weight and looks skinny. The best part is the pockets. They are exactly what I want. I can insert Iphone in the pocket located in the leg. My keys are put in the back pockets. My card is put in the pocket in the waist. Then I purchased another one with size XS for my daughter. She loves it as well.