Girls' metallic ribbed tights

Ordered these tights for my daugther in apricot mist in an XXS/XS and they are huge! I compared them to a pair of j.crew XXS/XS solid tights in navy that I also purchased and they are a good 8 inches longer. I'm not sure if I got a mislabeled pair or if these particular tights run large but I was quite disappointed. On a positive note, the knit and color is very nice.