<p>SIZE SUGGESTIONS: 1. Please measure Usually wear <strong>Shoes Insoles Length</strong> and choose size according to followings.</p><b>Size Detail</b>US 8 Little Kid - Inner Length of the Shoe: 5.90"/15cm;<br>US 9 Little Kid - Inner Length of the Shoe: 6.49"/16.5cm;<br>US 10 Little Kid - Inner Length of the Shoe: 7.08"/18cm;<br>US 11 Little Kid - Inner Length of the Shoe: 7.87"/20cm;<br>US 13 Little Kid - Inner Length of the Shoe: 8.46"/21.5cm;<br>US 1 Big Kid - Inner Length of the Shoe: 8.85"/22.5cm;<br>US 2 Big Kid - Inner Length of the Shoe: 9.25"/23.5cm;<br><p>PLEASE PURCHASE BIGGER SIZE IS BETTER THAN SMALL SIZE IF YOU ARE NOT SURE. </p>