nsole length=kid's feet length+( 0.5~1) cm    1 cm=0.39 inch

 how to choose size?

Step 1.measure your kid's feet length.

Step 2.your baby's feet length+(0.5-1)cm

Step 3.according to the size chart to choose right size,so easy.

For example:your kid's feet length is 19 cm,you need to add 1cm, 19 cm+1cm =20cm insole length,so choose US size 12.5.

The shoes with 2 wheels.

US 12.5=EUR 30= Insole length 20 cm
US 13.5=EUR 31=Insole length 20.5 cm
US 1=EUR 32=Insole length 21 cm
US 2=EUR 33=Insole length 21.5 cm
US 3=EUR 34=Insole length 22 cm
US 3.5=EUR 35=Insole length 22.5 cm
US 4.5=EUR 36=Insole length 23 cm
US 5=EUR 37=Insole length 23.5 cm
US 6=EUR 38=Insole length 24 cm
US 7=EUR 39=Insole length 24.5 cm
US 7.5=EUR 40=Insole length 25 cm

US 8=EUR 41=Insole length 25 .5cm