Blue inline skates that offer a comfortable fit with a combination of mesh material and plastic. - Color: Blue - Brake Type: Rear brake - Strap Type: Velcro - Design: Combination of mesh material and plastic Thank you for viewing. These are inline skates for children. The size is S, and you can adjust the size by pressing the blue button. The size markings are 30, 31, 32, and 33, but the exact size is unclear. I think it can be adjusted to sizes from about 18cm to about 20cm. My son bought them when he was about 17cm and played with them, adjusting with socks! I think the wheels used to light up in the front, but they don't light up now. There are scratches from use, but they are still usable. There is also a hex key to tighten the wheel screws. Please check the condition in the photos and consider purchasing if you are satisfied! If you have any concerns, I will add more photos, so please let me know! Thank you!