Highlights Adjustable Sizing at the push of a button! Medium expands from size 2 to 5. Small expands from 11J-1 Lightweight aluminum Frames with Urethane Wheels (Medium has 72 mm; Small has 64 mm) Fast Silver-5 Speed Rated (carbon) Bearings Deluxe Comfort Liner, Locking Cam-Lever Buckle, Power Strap and speed laces. Ventilation to keep feet cool, Brake on right skate Description Watch them learn to skate as they grow 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 11J to 1 and has 64 mm wheels. Size Medium adjusts from size 2 to 5 and has 72 mm wheels. Roller Derby® is America's Skate Company since 1936. *Adjustable sizing at the push of a button! Medium expands from size 2 to 5. Small expands from 11J-1. *Deluxe Comfort Liner, Locking Cam-Lever Buckle, Power Strap and speed laces.. *Fast Silver-5 Speed Rated (carbon) Bearings. *Reinforced Polymer Frame with Lighted Polyurethane wheels (Medium has 72 mm; Small has 64 mm). *Ventilation to keep feet cool; Brake on right skate.