Standard metal 12 inch ruler.[n 1]
A ruler is an instrument used for the measurement of length. They are made of wood, plastic or metal, and come in different lengths; 12 inches (30 centimeters) being the standard. Metal rulers are practically the same as any other ruler, but with added strength, making them a more effective and intimidating punishment device.
Found in offices, schools and stationery stores.
How to obtain
- 12 inches is 30 centimeters.