Triangular Inch/Metric Wooden Rulers
Price (if multi-sized, see below):$7.25
This 6" lightweight wooden triangle, printed on either angle with inches and centimeters, is all you really need on your desk. Easily stored with pens and pencils but small enough to stay flat on your desk. This useful little tool allows you to visually translate inches to centimeters, immediately. Maple with black or black with white.