Kryptonics Boom Adjustable Inline Skates - Junior Size 10-13 Adjustable inline skates with easy-push button switches between 4 sizes to fit kids as they grow Safety buckle with hideaway strap, power strap, and lace system to keep skates snug Removable rear brake that attaches to either skate enables easy and safe slowing or stopping 64mm x 24mm PVC wheels with ABEC-3 bearings make for a smooth and comfortable action sport Recommended for ages 5 through 8 years, supports child foot sizes of Junior Size 10-13