Frog (fastening)
A frog or pankou (simplified Chinese: 盘扣; traditional Chinese: 盤扣; pinyin: pánkòu), also called Chinese frog closure and decorative toggle, is a type of ornamental garment closure. Made from braiding, cord, fabric, or covered wire, they consist of a decorative knot button (a Chinese button knot for a traditional Chinese style) and a loop.