Ruler/Trimmer cuts straight every time! When your project requires accuracy, you’ll want to use this handy device in place of ordinary scissors. See-thru ruler has a built-in rotary cutting blade that glides easily and safely in either direction. Trim photos, paper, contact paper, card stock or other stationery. Set includes a flexible, self-healing cutting mat that protects surfaces. Ruler is 14" L; mat is 15" L x 4" W.