Review on Kids' Footless Embroidered Cartoon Leggings - Trendy Girls' Apparel for the Fashion-savvy by Justin Sharp

They list 8 sizes to choose from but you actually get S, M, L or XL. Bought size 9-11T and it barely fits my 6 year old as after checking the XL size it comes with both 5-8T and 9-11T. I don't know how to increase the size. The sizes are all mixed up. Also, after a few washes they become so thin that you can see the underwear that I can't wear anymore :(