JRP Crew Sock for boys or girls. These come individually and come up about 3/4 inch above the ankle bone and don't rollover. This style is very popular. The crew socks run a bit big. 75% Cotton, 22% Polyester, 3% Spandex.
The sizing below is according to JRP, I think a kid could wear the sock size listed below if they're 2 shoe sizes smaller than it says. Meaning a size 17 shoe could wear a size 4-5 sock.
Sock size 0-4 is for newborn to shoe size 18
Sock size 4-5 is for shoe size 19-22
Sock size 5-6 is for shoe size 23-24
Sock size 6-7 is for shoe size 25-27
Sock size 7-8 is for shoe size 28-31