The Golden Rule(r) is a handy wallet-sized ruler, designed based on the golden rule. Measure and draft lengths, angles, and perfect circles with this versatile tool that fits right in your back pocket! Makes the perfect gift for designers, architects, inventors, doodlers, and lovers of shiny things. This product is made from solid brass with a matte black coating, and laser engraved to reveal the brass beneath. This thick metal card is designed for use in your wallet, pocket, or between pages in your notebook. With a durable coating, the Golden Rule(r) is the perfect companion for sketching and drawing, and makes for a simple desktop accessory. Materials: Solid Brass with Black laser etched surface. Dimensions: Imperial Design - 3.25" wide x 2" tall