I throw the one with the hole out and match the other with the sock that didn't just up and disappear
naw...they go missin' anyway one by one
Don't you know that is why you always buy the same color socks and the same kind? That way, when the right one gets a hole, or the left one, you just save it...you'll have a same color sock bound to wear out from the other foot.
I can't remember the last time I got a hole in my sock.
I wear 'em til the hole is so big a bunch of my toes stick out, then I throw them away.