3-Sided Scale Slim Mini Mini Size, Lightweight 3-Sided Scale Originally used for drafting, this is a scale ruler. It's functional with a unique design, making it enjoyable to use as a regular ruler. The scales are laser-cut onto three sides, ensuring they last indefinitely. You can read scales from 1/100 to 1/600. Made of lightweight aluminum and in a mini size, it fits neatly into a pen case. Material: Aluminum Made in: Japan Size: 139mm wide x 9mm long x 9mm thick Specifications: Measures up to 12cm / Scales of 1/100, 1/200, 1/300, 1/400, 1/500, and 1/600 on each side / Comes with a plastic case