Now THIS is a cool set of socks!
This set comes with 3 pairs of nicely designed socks. Instead of just slapping on a poorly knit Sonic face, they took the time to make fun Sonic themed desgins for each sock. The first one is by far the coolest, as it is made to look like Sonic's shoe, sock & leg. The buckle is even drawn on!

The next pair is Green Hill themed. The foot part is all checkered, with the striped grass at the ankle, & blue 'sky' above. The final sock is sort of silly, as it is made to look like somehow Eggman is a foot. The toe is his pants, the heel & ankle his shirt & the top has a simplified Eggman face (bald head 'top' too) over his pointy yellow classic sytled collar triangles. Though it's kind of abstract, it's still a great pair for any Eggfans out there.
Good news! These are adult size socks so anyone can wear them. They began to appear in 2014, but where can you buy them? Write in if you have any info, as these look like they could be popular.