What is a self shank button?

A self-shank button is a type of button that features a built-in shank or loop on its back, allowing it to be sewn onto fabric without the need for a separate shank attachment. This design provides a raised profile, making it easier for the button to lie flat and secure on the fabric, which is especially useful for thicker materials. Self-shank buttons come in various styles, sizes, and materials, making them popular for both functional and decorative purposes in clothing and crafts.