Invisible Sew-in Magnetic Snaps are easy to install and make your finished projects look cleaner and more professional! These powerful magnetic snaps are exceptionally flat. They are encased in soft, pliable plastic, which is easy to sew through with a standard needle. You'll love the convenience of keeping your bags and clutches closed with the simplicity of this magnetic snap. One set of magnets is included (one positive and one negative). Dimensions: Magnet 3/4in diameter, Plastic 1.5in square.