How do GoodHangups work? The magic is our patent-pending MagnaStickers that stick to your wall or other surfaces and are removable and reusable. They can turn tons of surfaces into an instant magnet board…walls, doors, glass, and more. GoodHangups are great hanging prints, posters, and photos up to 24″ x 36″ No need for size-specific expensive frames. And when you want to change your art, you can do it in under 3 minutes.