I ordered 12-14 and thought they would be big enough for the child I ordered. The sizing chart says 12-14 fits a height of 60-64" and 90-100 lbs. The kid I ordered for is only 54" tall and weighs 72 lbs. They were so small and such so tight that we couldn't put them on above her knees.I wouldn't even know what size to change if I wanted to exchange them.