Size: 1 " x 1 " - Custom Bumper Stickers. When you use these personalized bumper stickers as your next giveaway, you'll get a lot of positive feedback from your consumers. Each sticker is contour cut to fit the shape of your design. There will be no additional backing or material around the edges because the backing is cut to the form of your sticker's design. This is an appealing and entertaining approach to advertise your company in a variety of ways.