Pocket-size Purple Architect Scale from Alumicolor measures only 6-inches long. Made of high-quality extruded aluminum, they are light weight and durable. The Calibrations are applied by a photo anodized process and will never rub off. Architect calibrations include: 16, (1/8, 1/4), (1/2, 1), (3/8, 3/4), (3, 11/2), (3/32, 3/16). For both students and professionals. Unique purple color!