Size information:
4 Toddler=Size 17=Foot Length 115mm(4.53")=Inner Length 125mm(4.92")
5 Toddler=Size 18=Foot Length 120mm(4.72")=Inner Length 130mm(5.12")
5.5 Toddler=Size 19=Foot Length 125mm(4.92")=Inner Length 135mm(5.31")
6 Toddler=Size 20=Foot Length 130mm(5.12")=Inner Length 140mm(5.51")
6.5 Toddler=Size 21=Foot Length 135mm(5.31")=Inner Length 145mm(5.71")
7 Toddler=Size 22=Foot Length 140mm(5.51")=Inner Length 150mm(5.91")
7.5 Toddler=Size 23=Foot Length 145mm(5.71")=Inner Length 155mm(6.1")
8 Toddler=Size 24=Foot Length 150mm(5.91")=Inner Length 160mm(6.3")
8.5 Toddler=Size 25=Foot Length 155mm(6.1")=Inner Length 165mm(6.5")
9 Toddler=Size 26=Foot Length 160mm(6.3")=Inner Length 170mm(6.69")
9.5 Toddler=Size 27=Foot Length 165mm(6.5")=Inner Length 175mm(6.89")
10 Toddler=Size 28=Foot Length 170mm(6.69")=Inner Length 180mm(7.09")