San Francisco Giants 12" Car Magnet Tell the world you’re a fan with your team magnetic banner. On your car, around the office, or at home, your magnetic banner looks great! It adheres magnetically – or use thumbtacks to attach to non-metal surfaces. It's made of heavy gauge magnetic vinyl, so it lasts and lasts. Colors stay bright, indoors or out! Plus, it's flexible, so it looks great on curved surfaces. The magnet is 12" in size. Images shown may differ from the actual product