Don't sweat it! People are shaped differently. I have friends who weigh about 140, but are pear-shaped, so they wear sizes 14-16. I have friends who are over 200 and wear a 13 or 15. It really all depends on where you hold your weight and what type of jeans you wear. In some jeans I have to get a 16 and in others I can fit into an 11 or 13, so it really all depends!