Clear metric rulers with centimeters and inches are flat, clear and 30 cm in length. The rulers are graduated in centimeters on one side and inches on the other side, and the red markings will not fade and cannot be scratched off.
Flat, clear, flexible, plastic ruler is 30 cm in length. Graduated in centimeters on one side and inches on the other side. A zero centering scale is printed down the middle. Red markings will not fade and cannot be scratched off.