When starting up your business, car sign magnets are a valuable tool! These always-in-stock items measure 11 3/4" x 16 7/8" and are approximately 0.030 thick. When used properly, car sign magnets can easily be removed and reused without leaving a residue. With your custom imprint prominently displayed, building brand awareness can be a smooth ride. "Remove weekly for surface cleaning." automatically added to every car sign. Four Color Process Rectangle Car Sign Magnet. REMOVE WEEKLY FOR SURFACE CLEANING will automatically be added to every car sign unless purchase order instructs artist not to do so.