Keep Calm and Carry On Bumper Stickers Vinyl - Like Car Decals-Be Calm and Carry On in Your Car Keep Calm and Carry On Bumper Stickers for your car, your college dorm room, your office One vinyl bumper stickers: Great gift. Bumper stickers have British WWII Keep Calm and Carry On poster slogan, and Crown. Comes with a card explaining the history of the British Keep Calm and Carry On poster print. Dimensions 6" ht. x 4" w. Quality bumper stickers.