I read the other reviews and realized my son needs to fit into small clothes. He wears Medium (8) in Old Navy and Target shirts, so I took a chance and scaled down. It suits him perfectly! The small one here is exactly the same size as the medium ones he usually wears from other brands. He is 7 years old, about 50cm tall and weighs about 55 pounds. Hope this helps someone else find their perfect form!
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