Specifications: Upper: Soft PU Bracket: Iron bracket Wheel: PVC plastic wheel + iron bearing Color: blue Volume25.0cm*14.0cm*20.0cm Shoe inner size:19cm-25cm (measured by hand, with a little error) Weight:1.8kg Package list: 1 * roller skates adjustable size: suitable for the foot length between 190-250mm, no longer worry about your kid's bigger feet. High quality materials guarantee that our roller skates are comfortable, soft, breathable and provide excellent ankle support for your child. The frame and durable bearings are a stable system to avoid potential safety, safe, smooth and strong enough to withstand the test of time. Our skate shoes improve the safety of your kids ice skating experience. To ensure smooth driving, please lubricate the ball bearings. Don't forget to clean your shoes regularly or germinate the bacteria. The aligned roller skate helps your child spend more time exercising outside instead of sitting on the sofa to play TV or a video game at home. Rollerblading is becoming more and more popular among children, a nice ice skate is a perfect gift for your child.