Lettering Stencil Folding Ruler, Blue (AS555488) Transparent jeweltones color Plastic and light Foldable Letters, numbers, shapes all-in-one Having troubles with writing letters and numbers neat and clean on signs, on journals, on birthday cards? Not anymore. With this foldable lettering stencil ruler, you can write letters and numbers and even draw the perfect circles, squares, triangles and all other different shapes with ease. It's foldable! It's convenient for you to carry around to draw the perfect letters and shapes.