The FITKIDS shoes are available in general sizes Small (10-11.5), Medium (12-13.5), Large (1-2.5), and X-Large (3-4.5), which match US child shoe sizes. But it can be helpful to know a little bit more detail about exactly what foot those shoes will fit!
FitKicks Kids shoe sizes can be easily estimated by measuring the bottom of your child’s foot. The foot should be smaller than the lengths indicated in the illustration. The measurement of each shoe from tip to heel is: Small 6 inches, Medium 7 inches, Large 7.5 inches, and X-Large 8 inches.