Rulers come in plastic, wood, or metal. They also come in a variety of lengths. The most common are 15cm and 30cm in schools. Then are special types such as the architectural triangular ruler which allows them to draw infrastructure measurements accurately to a miniature version. Among all types of rulers, metal rulers are the most precise enabling you to acquire accurate measurements. The edge of metal rulers won't chip easily too, allowing you to make straight lines all the time.
| Color | Silver. |
| Material | Stainless steel. |
| Size | Approx 12" (30cm). |
