I'm 5'11 and have a smaller frame.  I can fit into small and medium clothing.  I ordered a pair of these leggings in medium and the color nude.  They were so small.  So small, I gave them away to a friend.  They were awful and so very uncomfortable.  The color was gross.  It made my legs look like fake plastic doll legs, the cheap looking ones.  If you do buy a pair, go up a size or even 2, not joking, and don't order nude!