My 18 month old grandson wears a size 4 and they run small. However, he hates shoes, so it's okay if they're a bit small. At least I don't have to worry about him taking them off and throwing them away when I'm not looking. They are a bit thin but they have "rubber" soles which is why I bought them. He keeps losing his balance on the mudguard and falls. I'm pretty sure that won't happen with these.
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