Product information: Name : Wheeled Sports Shoes Size: 27~40 Wheel material: PU 1. Open the cover on the sole, then press the button on the back of the shoes and the wheel It will come out. 2. Press the button and the wheel at the same time, then the wheel will be stored and forget to close the Cover as the last step. 3. There is a button inside the shoes to control the LED light. Size: 27 ------ 185mm long 28 ------ 190mm long 29 ------ 195mm long 30 ------ 200mm long 31 ------ 205mm long 32 ------ 210mm long 33 ------ 215mm long 34 ------ 220mm long 35 ------ 225mm long 36 ------ 230mm long 37 ------ 235mm long 38 ------ 240mm long 39 ------ 245mm long 40 ------ 277mm long Kindly Reminder: Please choose the shoes size according to your foot length, and not according to your normal size in your city. If you buy this product, we will send it as soon as possible.