Beveled edge See through graph ruler is 18" x 2" | 46 cm
The Westcott Ruler is constructed in plastic and features beveled edges that make it a good choice in working with ink. Each ruler has a zero centering scale and is laminated for durability.
C-Thru graph ruler B85 is a lightweight, clear ruler which offers handy grid patterns in inches. There is also a "0 centering scale," so you can measure equally left and right from a centered starting point.