----US Size------:--- Inside Length -------- Suitable for Feet Long<br> 8.5 M Toddler----:------- 16 cm --------------- 15~15.5 cm <br>9.5 M Toddler----:------- 16.5 cm --------------- 15.5~16 cm <br>10 M Toddler----:------- 17 cm --------------- 16~16.5 cm <br>10.5 M Toddler----:------- 17.5 cm---------------- 16.5~17 cm <br>11 M Toddle ----:------- 18 cm --------------- 17~17.5 cm <br>11.5 M Little Kid--:------- 18.5 cm --------------- 17.5~18 cm <br>12 M Little Kid--:------- 19 cm --------------- 18~18.5 cm <br>13 M Little Kid--:------- 19.5 cm --------------- 18.5~19 cm <br>13.5 M Little Kid--:------- 20 cm --------------- 19~19.5 cm