If I were to attempt to copy the ruler, I'd go to the Dollar Store and buy a school set from the Office Supply section. (The kit with a ruler, different angled triangles, a protractor and usually a compass). I would print out the paper pattern from Quilterscache, and I'd lay the right angle triangle from the Dollar Store over it. I'd mark the lines with tape. I'd use the paper pattern to measure the width of the strips of fabric, and I'd add 1/2 inch.