Watch him learn to skate as she grows in the Stryde Lighted Adjustable Inline Skates. Grippy, bouncy indoor/outdoor lighted polyurethane wheels with speedy Silver-5 bearings ensure a smooth, quiet and confident ride. Designed to expand with growing feet, the Stryde adjusts up to four full sizes at the push of a button. Size small adjusts from children's shoe size 11 to 1 and has 64 mm wheels. Size Medium adjusts from size 2 to 5 and has 72 mm wheels. ROLLER DERBY Stryde Lighted Boy's Adjustable Skates Feature: SIZING Adjustable sizing at the push of a button! Medium expands from size 2 to 5. Small expands from 11-1. BOOT Deluxe Comfort Liner, Locking Cam-Lever Buckle, Power Strap and speed laces. BEARINGS Fast Silver-5 Speed Rated (carbon) Bearings. FRAME Reinforced Polymer Frame with Lighted Polyurethane wheels (Medium has 72 mm; Small has 64 mm). WHEELS Lighted Polyurethane wheels (Medium has 72 mm; Small has 64 mm) Brake on right skate.