As these are kids headphones I figured they would be standardized smaller than adults and then get bigger as kids grow. Fully built they are still too big for my 3 year old and she is in the 95th percentile for head size. I've compared them to my Bose adult headphones and they seem to be a similar size. I don't think they should be advertised as a general statement for kids, maybe just for older kids aged 10+/up to teens/teens. Otherwise they are very cute and appear to be of good quality/comfortable.
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