Fiskars 3x18 Inch Acrylic Ruler (187640-1001) Highlighted seam allowance makes it easy to cut fabric strips up to 3 inch wide directly from the bolt Broken grid lines and easy-to-read measurements make measuring quick and accurate 30-, 45- and 60-degree line indicators make it easy to cut at perfect angles Optional non-slip vinyl feet can be added or removed without damaging the ruler Lifetime warranty