Stride in style with the Stryde adjustable inline skate from Roller Derby. This skate is great for growing kids, both boys and girls! These skates easily adjust between 4 full sizes, saving you a fortune on skates while your kids are still growing. The small skate adjusts from size 12jr to size 2 and the medium skate adjusts from size 3 to size 6. The Stryde skate has urethane wheels, 64mm for the small skate and 72mm for the medium skate.