I measured my leg as the description said to but I do have pretty short legs so the top fits great and the bottom is a little lose. That being said these are great and are going to change how often I wear skirts/dresses. The day after the first pair arrived I ordered a second pair in the next size down so that I would have a second set. I will wear both of them. They are extremely comfortable which surprised me as thigh high items have always been an issue for me, either to tight or the sticky part would pull at my skin when I moved, neither of those things happened with these.