What is a "button"?

A button is a small, often round or square-shaped, fastener used to secure two pieces of fabric together. It typically has a flat or slightly convex surface, with a small hole in the center that a thread can be passed through to attach it to the garment. Buttons are commonly made of materials such as plastic, metal, or natural materials like wood or shell, and can have a wide range of decorative designs or be plain and functional. They can be found on a variety of clothing items, from shirts and jackets to pants and skirts, and can be used for practical purposes or as a decorative element.