Toddler 8M-8.5M=6.1"=155mm-----------------Toddler 9M=6.3"=160mm Toddler 9.5M=6.5"=165mm-------------------Little Kid 10M=6.7"=170mm Little Kid 10.5M=6.9"=175mm---------Little Kid 11M-12M=7.1"=180mm Little Kid 12.5M= 7.3"=185mm--------------Little Kid 13M= 7.5"=190mm Little Kid 13.5M=7.7"=195mm----------------Little Kid 1M= 7.9"=200mm Little Kid 1.5M= 8.1"=205mm-----------------Little Kid 2M= 8.3"=210mm Little Kid 2.5M= 8.5"=215mm------------------Big Kid 3M= 8.7"=220mm Big Kid 3.5M-4M= 8.9"=225mm-----------------Big Kid 5M= 9.1"=230mm
Big Kid 5.5M= 9.25"=235mm(Women 7M)
Big Kid 6M= 9.4"=240mm(Women 7.5M)
Big Kid 6.5-7M= 9.6"=245mm(Women 8M)
Big Kid 7M-7.5M= 9.8"=250mm(Women 8.5M)
TIPS: Select the size according to the length of the foot.Please measure the length of foot on the ground.If the foot is fat,or wide, choose bigger size.