Leggings run small. I suggest you go up a size.
 The brown-haired model wears size 3 to 5 pants and she ordered a small.
 The blonde model is wearing a size 7 and she ordered a medium.
 Small = 0-3 years
 Medium = 4-6
 Large = 7-9 years
 Fabric: Spandex 25%, Nylon 75%