Length: 12". Width: 1/2". Graduated in 10ths and 100ths on one side, and 32nds, & 64ths on the other. The combination of a black chrome finish and precisely etched white graduations make these rules very easy on the eyes. They are manufactured from a hardened steel alloy that makes them very flexible and durable. 1 lbs (0.5Kg) shipping weight.