Please notice that the size above is inner length. And there maybe 0-1cm
error due to the measure by hand.
The size you need=length of your child's feet 1~2cm
Please choose the bigger size for the children feet grow very fast.

US size 10.5=CN size 27(shoes inner length 17.2cm)

US size 11=CN size 28(shoes inner length 17.8cm)

US size 11.5=CN size 29(shoes inner length 18.4cm)

US size 12.5=CN size 30(shoes inner length 19cm)

US size 13.5=CN size 31(shoes inner length 19.7cm)

US size 1=CN size 32(shoes inner length 20.3cm)

US size 2=CN size 33(shoes inner length 21cm)

US size 3=CN size 34(shoes inner length 21.7cm)

US size 3.5=CN size 35(shoes inner length 22.3cm)

US size 4=CN size 36(shoes inner length 23cm)

US size 5=CN size 37(shoes inner length 23.6cm)

US size 6=CN size 38(shoes inner length 24.2cm)

US size 7=CN size 39(shoes inner length 24.9cm)