I think the kids feet grows every few months because we constantly have to buy them new shoes as they outgrew their shoes very often. We can't buy them the size that is a little longer than their feet because it's uncomfortable for the to walk so it is always the right fit. I am glad that I found the Asics on sale and I also find a good pair for our daughter.
Most if my children's shoes are still in great condition so I always send them to my nephewes and nieces who can use them.