Our 1 line plain post address sign is 14.75 inches wide by 3.25 inches tall. This sign is permanently cast Aluminum by Montague Metals in Michigan USA. Use indoors or outdoors as the sign is suitable for both. This address sign holds up to (17) 1.25 inch characters which are cast on both sides of the sign. The black satin finish is baked on for maximum durability and the raised white letters are reflective for added visibility.