Ylllu Kids LED USB Charging Roller Skate Shoes with Single Wheel Shoes Light up Roller Shoes Rechargeable Roller Sneakers for Girls Boys Children(4 US Big Kid, White)

? There is a switch inside the shoes to activate the lights. When it is turned on, motion/vibration activates them. When it is turned off, it's off. SIZE CHART: 11 US Little Kid ---- EU 27 ---- Feet length(in)6.98 11.5 US Little Kid ---- EU 28 --- Feet length(in)7.18 12 US Little Kid ---- EU 29 --- Feet length(in)7.38 12.5 US Little Kid ---- EU 30 --- Feet length(in)7.75 13 US Little Kid ---- EU 31 --- Feet length(in)7.77 1 US Little Kid ---- EU 32 --- Feet length(in)7.97 1.5 US Little Kid ---- EU 33 --- Feet length(in)8.16 3 US Little Kid ---- EU 34 --- Feet length(in)8.36 3.5 US Little Kid ---- EU 35 --- Feet length(in)8.56 4 US Little Kid ---- EU 36 --- Feet length(in)8.76 4.5 US Little Kid ---- EU 37 --- Feet length(in)8.95 5.5 US Little Kid ---- EU 38 --- Feet length(in)9.15 6 US Little Kid ---- EU 39 --- Feet length(in)9.35 6.5 US Little Kid ---- EU 40 --- Feet length(in)9.54 Please Note: 1. To ensure your best fit, please have a careful check of size info before order. If your feet is wider than normal, please choose a bigger size. 2. If you have any other question of our shoes you can contact us by email and we will help you to solve it well as soon as possible, thank you for your understanding and support~