👉 A buttonhole is a type of decorative element used in clothing, accessories, and home decor. It consists of two overlapping triangles sewn together at the ends to form a rounded shape that can be worn on the neck or around the waist. The buttonholes are typically made of fabric with a round shape, such as a pleated skirt or a structured blouse. They can also be used for decorative purposes in clothing, such as adding a touch of elegance or sophistication to an outfit.