Roller Derby EZ-Roll Boy's sz 11-2 Adjustable Youth Roller Skate Molded cuff and heel plate for support, Deluxe padded comfort liner, and Cam lever locking buckles Chassis has a custom Lower Center of Gravity design Custom polyurethane wheels G-Force 608ZB carbon bearings EZ twist knob adjustable sizing with two adjustable sizes available:  Small fits Junior sizes 7-11  Medium fits sizes 11 Junior-2 Youth