Sanuk Little Kid/Big Kid Lazy Brat Sandal 100% Synthetic Rubber sole XS= 8/9, S= 10/11, M= 12/13, L= 1/2, XL= 3/4, XXL= 5/6 Sizes XS&S ship w/removable backstrap Wide padded waterproof strap Anatomical molded footbed with arch support and toe bar