children's shoes

US 5.5 = Insole length 13 Cm = Size (CN) 21 
US 6 = Insole length 13.5 Cm = Size (CN) 22 
US 6.5 = Insole length 14 Cm = Size (CN) 23 
US 7 = Insole length 14.5 Cm = size (CN) 24