ADJUSTABLE INLINE SKATES -S/M/L, and each size is adjustable , Please make sure to choose the correct size via checking enclosed size chart pictures . And do not forget to adjust the length of boot by the push button before wearing, you will find that it's so convenient to operate, and kids and youth can use it for many years even though their feet are growing up.8 WHEELS ILLUMINATING - Our inline skates for kids come with four illuminating wheels that lights up automatically when you start to skate. The lights are powered by wheels rolling and never need replacement batteriesJust imagine how cool it will be to flash as bright as a lighting bolt in the darkFREE SKATES & SINGLE BRAKE DESIGN - The single brake is equipped on right foot instead of two brakes installing on left and right feet to prevent the danger of falling backwards when braking.