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. 12" Student ruler built with Product Protection. Contains an agent to help inhibit the growth of bacterial stains and odors. Fits perfect in a 3-ring binder. Assorted colors (color can't be specified when ordered). Suitable for use in the home or classroom. Inches/Metrics