This decal is completely removable and repositionable. 7 Wall Decals. Cars Mater Giant Wall Decal. Applies to any smooth surface. Easy to apply - just peel and stick. Decals are removable and repositionable with no sticky residue. 18" x 40". RoomMates® Cars Mater Peel and Stick Giant Wall Decal brings the action of Disney Pixar's cars to any wall.