We Ordered a size up (11/12) as he is currently wearing a US 9/10 and they were a little tight from the start but serviceable as he is quite thin. After being washed in cold water and tumble dried, 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. We really wish they fit better and are sad to have to return them.
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