Yesimai 1 Pair Adjustable Children Kids Runaway Speeding Halo Roller Skates Wheels Skating Shoes Size: Adjustable Wheel diameter: approx 70mm / 2.76 " Reliable you can adjust the size of the middle screw lightweight it can easily be installed on flat shoes Shoelace convenient to install and remove. Easy to control the center of the body suitable for children Wheels are resilient also can play on the wooden floor