I love these shoes. They stay in place, don't hurt my daughter's feet and she always enjoys wearing them. For reference, my 13 month old daughter who is just learning to walk wears size 4 shoes and size 2-3M fits her perfectly and has nowhere to grow. I also bought the next size up in Crocs Kids' Classic K Clog size 4 Crocs Kids' Classic K Clog, Pepper, 4 M US Toddler and the size difference is quite small. See pictures for reference.
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