Shoes are so expensive here that we usually stock up when we have a trip to the States. Andrés really gets into getting the boys their shoes for the coming year, and usually goes ahead and gets shoes for other coming years, as well. Consequently, both boys have closets full of shoes in different sizes.
It works great for Agustín - if we forget to have him wear a certain shoe and he outgorws it, it goes directly to Nico. However, if we forget to have Nico wear his... well, then it goes to a co-worker whose son is a couple of years younger than Nico. Recently we had to give her two pairs of shoes - never been worn - from Old Navy and The Children's Place, which were so so cute but just didn't fit anymore.