ADJUSTABLE INLINE SKATES - (Please must confirm the size before placing the order). Our inline skates have 4 different Unisex sizes, S/M/L/XL, 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 the 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 light up automatically when you start to skate. The lights are powered by the wheels rolling and never need replacement batteries! Just imagine how cool it will be to flash as bright as a lightning bolt in the dark! STURDY AND SMOOTH - The frame of our inline skate is made from reinforced aluminium alloy, high rebounded 82A polyurethane wheels are wear resistant & more smooth, high-speed mute ABEC-7 bearings are made from premium quality carbon steel.