It's Going Tibia Good Day socks from Sock It To Me. We've been asked over and over, and over, to make an x-ray sock and we answered. These glow-in-the-dark leg bones will make your kid the coolest. Approximately fits children ages 7-10, shoe size 1-5. Made of 60% Cotton, 38% Polyester, 2% Elastane Exclusive of Elastic. Made in South Korea.