Highway Signs are a great way to advertise year model. These non fade Red, White and Blue adhesive windshield signs are cut in the shape of a highway sign. Waterproof vinyl with a removable adhesive that leaves no gummy residue. 8 1/2″ wide x 8 1/2″ tall, neatly shrink wrapped in packs of 12 and sold by the dozen. Each sign has a chipboard backer to prevent curling during storage and is slit on the back for easy application.ice.