Star Baby Boy LED Kids Shoes Sneakers Light Shoes For Children Upper Material: Canvas Insole Material: Cotton Shoes Soles Material:Rubber Pattern Type: Solid Size: 21=Insole Length13.5CM 22=Insole Lenth14CM 23=Insole Lenth14.5CM 24=Insole Lenth15CM 25=Insole Lenth15.5CM 26=Insole Lenth16CM 27=Insole Lenth16.5CM 28=Insole Lenth17CM 29=Insole Lenth17.5CM 30=Insole Lenth18CM Lamps and batteries are consumables, we will check before delivery, the duration of the light is not guaranteed, through the lights do not shine this does not belong to the quality problem can not be returned, mind buyers please take care about it.If you wear 1-2 days, the shoes don’t lantern light is normal, you can change the battery. How to choose the right size: Foot length of your kids+0.5~1cm=insole length Note: 1.please read size information before choose size,thanks.Unit:CM,1cm=0.3937inch 2.The size chart is just for recommend,Please check the specific chest and length. 3.Because each child's individual boby,Parameeters are reference only. 4.The picture show only of the sample,because of the light,environment,camera,various influence,picture and the real items have a little different 5.Artificial measurement will be 1-3cm error,Please kindly understanding. Thanks!