Here's a bit of a strange pair of socks...
These are by Bio World, and are a part of their "Character" sock line. As you can see, they've also got Street Fighter Ken & Horror Movie Jason on their line along with classic Sonic. These are gimmick socks, they're knee-highs with the character either compressed (Ken) or stretched out (Sonic) to fit the long rectangle shape of the sock. Sonic is suffering from a bad case of 'big body' and the arms are shown kind of growing out of his chin a bit? Also, the legs seem like they are too far apart at where the hips would be, and go strait down....all this combines to make it a very strange pose, alsong with his hands just sort of...down and fists.
The packaging has a blurb about Sonic, how he's the star of his fast moving 1990s video games, and continues to be popular today, etc. (It's noting amazing, just some extremely standard information) This is a Spencers' Gifts item and is likely 12.99 for 1 pair of odd gimmick socks in 2019.