- Model Name: UHIDA Triangle Ruler - Size: Large - Color: Clear - Material: Plastic Thank you for viewing. This is a triangle ruler with markings and grid lines every 5mm. I purchased it as a high school textbook, but it is unopened. However, the outer bag it came in was dirty, so I discarded it. There is some deterioration on the case that wraps the ruler. Please purchase only if you understand this. I will wrap it in air cushion and send it in a brown envelope. I plan to ship via Rakuraku Mercari. Thank you for your consideration.