Metal Edge Craft Ruler - 12" long (30cm) This 12" metal edge ruler is a craft box must have. This ruler will make all your matting and layering of card and paper so much easier. The grid lines are spaced at half centimeter measures and you will also find millimeter measure as well. The thin metal edge ensures that you don't slip and cut into your ruler. A great crafters essential tool and a must have for all your card making, scrap booking, ATC's, altered art and any other craft projects. Key Facts: