ComfoexComfoex Boys Socks 6 Pairs Ankle Athletic Sock Half Cushioned Low Cut Socks For Little Big Kids

The size options aren’t showing small, medium, and large but rather 2-9, 3-9, and 4-9. Which of these is a medium?

My 2 year old wears 9 toddler shoes. What size sock should i get fit this product?

Are these made in the US?

What is the material of the boys ankle socks?