Size information:
3 Toddler=Foot Length 110mm(4.33")=Inner Length 120mm(4.72")
4 Toddler=Foot Length 115mm(4.53")=Inner Length 125mm(4.92")
5 Toddler=Foot Length 120mm(4.72")=Inner length 130mm(5.12")
5.5 Toddler=Foot Length 125mm(4.92")=Inner length 135mm(5.31")
6 Toddler=foot length 130mm(5.12")=Inner length 140mm(5.51")
6.5 Toddler=foot length 135mm(5.31")=Inner length 145mm(5.71")
7 Toddler=foot length 140mm(5.51")=Inner length 150mm(5.91")
7.5 Toddler=foot length 145mm(5.71")=Inner length 155mm(6.1")
8 Toddler=foot length 150mm(5.91")=Inner length 160mm(6.3")