Hougie is a double sided score board that gives you accurate measuring in centimeter and inch increments. With accurate measuring you will develope confidence and with confidence comes speed. If you are used to thinking in inches and the project you wish to do is in centimeters it doesn't matter. There is no need to try and convert one in to the other. Just turn Hougie over and score along the desired score line. Hougie makes measuring quick and easy. And best of all ..... no crafters frustration.