When I waited in line to vote, I worked away on the second foot of LB's Flat Feet socks.
I can say with confidence that a Flat Foot will make two knee socks if they're made for a woman. For a man with size 11 feet, I've been told that they will make two boot socks. Apparently men don't wear knee socks. It's boot socks or kilt hose. That's it. Who knew?