This magnetic sign is small enough to keep in your vehicle and can quickly be installed at a moments notice. If properly cared for this sign will give you many years of service. It is produced with the same materials as most industrial grade signage. Our signs are digitally printed on 3M high performance vinyl and covered with a clear over-laminate. They are designed for metal vehicles only (except aluminum). These are not sold in pairs so if you want two you will need to order 2 etc. This sign measures 12 inches across by 7 inches tall (30 x 17.5 cm) and should fit almost anywhere on your vehicle.