I bought the large in these leggings because my hip size is 41 1/2 and my waist is 35. I should have gone with a medium. These have pretty good stretch and whenever you've worn them for a while they seem to stretch out more and feel looser. The material is great but next time I will purchase in medium. And one more thing, I wish these offered different length sizes! Im 5'1 and I need to chop off a good 3 to 4 inches in order to make these look better on me. Overall for the price I will purchase again even though I need to adjust them.