Westcott Drafting & Drawing Tools are some of the finest products of their kind for students and professionals. Our commitment to meticulous quality and cutting edge innovation in measurement and art materials has earned an unparalleled reputation. Durable plastic ruler is ideal for students. Beveled edge acts as an excellent drawing and drafting guide. Standard and metric markings simplify measurement tasks. Convenient two and three ring binder slots enable easy storage. Imperial (English)/Metric measurement system. 1/16" and metric scales. 12". Sold as a pack of 36 in assorted colors (no color choice): Red, Yellow, and Blue. Recommended age 5+ years