To find out whether the size of shoes is appropriate, you can try to take out the insole and let children stand on it. With heel closely follow the insole’s end, if there is room for one finger between the forefoot and the insole, that means it is suitable. If there is no room or that the toes are longer than the insole, that means the children’s foot has grown longer and it is necessary to buy suitable shoes. Sometimes, the insole of some shoes cannot be pulled out. It is recommended to use newspaper or other kinds of paper to insert into the shoes. Try to flatten the paper inside the shoes so that the paper adheres to the inside of the shoes. Later, take it out and compare it with the children’s feet.