Dear customer: Because each country has different size label, so choose the correct size, need to measure the child's foot length,check size information.
For example: The kids foot length 11.0 cm, need to choose the insole length is 12.0 cm, because need to give the socks 1 cm space.
Insole length=Foot length (Heel to toe) + 1.0cm.
Foot Length 11.0 (cm) Suitable for Insole Length 12.0 (cm).
If feet are wider or fat, it is recommended to place order for one size larger.
If you have any questions,Please send message,we will help you.
* Please note that due to the light and screen show, slight color difference should be acceptable, hope you can understand.