Ruler &ndash; Adhesive Backed Decal on a Roll &ndash; Fractional/Metric &ndash; 12 Inch (30 Centimeter) Long &ndash; Left to Right &ndash; 50 per Roll &ndash; White Each ruler decal measures 12 inches on one side and 30 centimeters on the other. Decals are 1 inch wide by 12 1/2 inches long. Every roll contains x50 peel-and-stick rulers. Writing space on each unit makes them useful for labeling, identifying, and referencing. Non-Glare surface. Adhesive is both high-tack and decals are removable without residue.