This sock is from the release of Sonic & Knuckles on the Megadrive. These socks came in small childrens' sizes only. The ankle part has the famous S & K symbol around it, and the words "Sonic & Knuckles" below that. The rest is patterned with squares that have either a brick-like line texture, or foreward-facing portraits of Sonic or Knuckles on a black background. Why they chose these somewhat unflattering stock arts is unknown...maybe they didn't want it getting too similar to the symbol's profiles?