What is the enamel pin badge?

An enamel pin badge is a small decorative lapel pin or pin badge made from metal, typically brass or copper, with a design or image filled in with colored enamel. The design is often raised and outlined by metal edges. Custom enamel pins are commonly worn on clothing, backpacks, hats, or displayed on a pin board. They are popular among collectors and are often used to express personal interests, affiliations, or as a fashion accessory.