With this ruler cutting hexagons of varying sizes is quick and easy. All the math is done for you. The Fons & Porter Hexagon Ruler is designed to cut finished hexagons from 2in to 6in tall. Simply cut a fabric strip, then cut the hexagons from the strip using the marked lines on the ruler that correspond to your finished size. Template measures 3.75in on each side, and 7.5in from angle to cross template angle. Easy to understand directions printed on the ruler.