Add some character to your mailbox one of with these rich designs. Mailbox covers in this section are suitable for any time of year. If you like to change your mailbox cover with the different seasons, please look under our Seasonal and Holiday category. Each mailbox cover is PVC coated, weather and fade resistant and has a full magnetic backing. Changing the look of your mailbox is easy with these magnetic covers. Each cover includes a set of adhesive, reflective numbers. Size: 18" x 24" and fits standard “T1” mailboxes.