👣 Before buying it, customer need to know: About Two-wheeled shoes: If you want to use this shoes as roller skates,please press the safety button(behind shoes)and the rear wheel will pop up! 👣 Size chart: UK 10 Kids ----------foot length 7.28"/ 18.5cm------EU 28 UK 11 Kids ----------foot length 7.48"/ 19.0cm------EU 29 UK 12 Kids ----------foot length 7.68"/ 19.5cm------EU 30 UK 12.5 Kids -------foot length 7.87"/ 20.0cm------EU 31 UK 13 Kids ----------foot length 8.07"/ 20.5cm------EU 32 UK 1------------------foot length 8.27"/ 21.0cm------EU 33 UK 2------------------foot length 8.46"/ 21.5cm------EU 34 UK 2.5----------------foot length 8.70"/ 22.1cm------EU 35 UK 3------------------foot length 8.97"/ 22.8cm------EU 36 UK 4------------------foot length 9.25"/ 23.5cm------EU 37 UK 5------------------foot length 9.45"/ 24.0cm------EU 38 UK 6------------------foot length 9.65"/ 24.5cm------EU 39 UK 7------------------foot length 9.85"/ 25.0cm------EU 40 UK 8------------------foot length 10.03"/ 25.5cm-------EU 41 👣 Tips: 1.Our new Multifunctional Deformation Shoes support USB charging. 2. When charging or unplugging the power,please gently pull out the charging port. 3. Do not wear this shoes when you do strenuous exercise,cause it will damage electronic cables 4. Recommended charging time:2-4 hour. 5. Beginner please be cautious when sliding. 6.If you have any problems, please feel free to contact our service customers, thanks.