The term "22-gauge" typically refers to the thickness of a wire or metal sheet, commonly used in various applications, including electrical wiring and sheet metal fabrication. In the context of firearms, it describes a specific size of shotgun shell, which is smaller than the more common 12-gauge and 20-gauge shells. In terms of wire, 22-gauge is often used in crafting and electronics due to its balance of flexibility and strength. It is also a popular choice for making jewelry and other small projects, as it can be easily manipulated while still providing durability.