The quantity is different. Mathematically, a sock is 1 and a pair of socks is two socks, so the difference between a sock and a pair of socks is the difference in quantity. Socks are a kind of clothes worn on feet. Play a role in protecting feet and preventing foot odor. Socks are a general term. According to the raw materials, there are cotton socks, woolen socks, stockings and various chemical fiber socks. According to the shape, there are stockings, stockings, boat socks, pantyhose and so on.