I'm not sure how or why a lot of girls felt these ran small, I mainly wear a 6 and an occasional 7 so I ordered a 6 1/2 and it was HUGE! I had about 2 inches left of room, so I sent them back and am waiting for a 6. I did notice when I tried them on that they made my calves look kind of big :/  these might not be a keeper for me...