These vinyl stickers are static cling (no adhesive) and are intended for the inside of the window. They stick handily to the inside of any clean glass window. These are ideal for rear windows of your car. The white background was selected to show through most tinted windows. Each sticker is 13 inches long and 2 inches high and printed on fade resistant heavy gauge vinyl. Stickers can be mailed via the USPS in 8.5 x 11 envelopes.