Use indoors or outdoors with total peace of mind as each printable bumper sticker is made with thick vinyl material that has been laminated for top-tier durability against water, sunlight, and scratches. .: Material: premium water-resistant vinyl .: Waterproof sticky adhesive .: Suitable for indoor and outdoor use .: Easy peel backing .: Matte finish .: 11 x 3 and 2 x 2 (round)