i think they are a bit too young but look good. maybe black and white socks would be better for a 14 year old or navys and grey colours?
I am 14 , personally, i would wear just white socks, or blacks and greys but not those, ,
I thiink they looka bit to childish, but maybe the one's with the stripes. but not with the balls (soccer)
like but it's up tp him why don;t you ask him what he thinks and if he doesnt like them take them back or keep them for yourself.