We ordered a size up (11/12) as he now wears a US 9/10 and they were a little tight out of the box but workable as he is quite thin. After washing in cold water and tumble drying, they shrunk badly and our son could barely get them over his head. Seeing how dense they are I'm not sure if 13/14 would be better as they are VERY thin. We liked the bright colors and the quality seems pretty good for the price.
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