Warm tips: 1.We recommend that you use up the power when you use it for the first time, and then fully charge it to ensure your best experience. 2.Because of the material,please don't dip your shoes in the water. Size Chart: 8 Toddler For Insole Length 6.3"/16.0cm = EUR 25 8.5 Toddler For Insole Length 6.6"/16.7cm = EUR 26 9.5 Toddler For Insole Length 6.8"/17.3cm = EUR 27 10 Little Kid For Insole Length 7.1"/18.0cm = EUR 28 11 Little Kid For Insole Length 7.4"/18.7cm = EUR 29 11.5 Little Kid For Insole Length 7.6"/19.3cm = EUR 30 12 Little Kid For Insole Length 7.9"/20.0cm = EUR 31 13 Little Kid For Insole Length 8.1"/20.7cm = EUR 32 1 Little Kid For Insole Length 8.4"/21.3cm = EUR 33 1.5 Little Kid For Insole Length 8.7"/22.0cm = EUR 34 3 US Men/4 US Women For Insole Length 8.9"/22.7cm = EUR 35 4 US Men/5 US Women For Insole Length 9.2"/23.3cm = EUR 36 5 US Men/6 US Women For Insole Length 9.4"/24.0cm = EUR 37 6 US Men/7 US Women For Insole Length 9.7"/24.7cm = EUR 38 6.5 US Men/8 US Women For Insole Length 10.0"/25.3cm = EUR 39 7 US Men/8.5 US Women For Insole Length 10.2"/26.0cm = EUR 40 8 US Men/10 US Women For Insole Length 10.5"/26.7cm = EUR 41 9 US Men/10.5 US Women For Insole Length 10.7"/27.3cm = EUR 42 10 US Men/11 US Women For Insole Length 11.0"/28.0cm = EUR 43 10.5 US Men/12 US Women For Insole Length 11.3"/28.7cm = EUR 44 11 US Men/13 US Women For Insole Length 11.5"/29.3cm = EUR 45 12 US Men/14 US Women For Insole Length 12.0"/30.5cm = EUR 46 Package Included: 1 X LED shoes 1 X USB Charging Cable