22-gauge wire is a type of electrical wire that is commonly used in various applications, including electronics and crafting. The "gauge" refers to the thickness of the wire, with a lower number indicating a thicker wire. A 22-gauge wire is approximately 0.64 millimeters in diameter, making it suitable for low to moderate current applications. This wire is often used for connecting components in circuit boards, making it ideal for hobbyists and professionals alike. It is also popular in jewelry making and other crafts due to its flexibility and ease of use.