Our large solid cast Aluminum cast flat, wall mount style address sign features permanent, raised white reflective letters/numbers on a durable, baked satin black background. Lettering/numbers are maximum 1 line up to (5) 3 inch characters. The address sign itself is 11.5 inches wide by 4.5 inches tall. These wall mounted address signs are forever rust free and quite suitable for indoors or outdoors, as you see fit. These are great address signs for porches, garages and signs in hallways for apartment numbers etc.