Beware of Wife Novelty Metal Circular Sign Metal Circular Sign. 12" aluminum metal circular parking sign. This item has a flat surface which is perfect for engraving or applying vinyl lettering to it. Made of the highest quality aluminum for a weather resistant finish. It is lightweight & durable. Pre-drilled holes for quick and easy mounting. Add a ribbon, wire or string to instantly personalize your sign. Individually shrink-wrapped and proudly made in the USA.