The Surprisingly Tumultuous History of Socks: "Socks and stockings originated...:
...as simple pieces of felt stuffed into shoes to provide warmth. In ancient Greece, they became rolls of woven cloth bandaged around the legs and feet. It was in second-century Rome that they took their current shape as specialized foot coverings sewn from pieces of woven cloth. They didn’t stretch, though, because knitting hadn’t been invented yet.