The elderly marked. Use suction cups to stick to the inside of the rear wind. Be sure to have it all the other drivers understand. Please do not use on the outside of your vehicle; Size: Approx. 6.0 x 8.1 inches (153 x 205 mm) (including suction cup); Material: Main body: PP, acrylic reflective, suction cup; Uses: Automotive display mark, elderly people, car supplies; Product name: Senior.