Make perfect half triangle squares and quarter triangle squares in sizes up to 9-1/2". Fully illustrated and detailed instructions are included.*Product cannot to be sold on any 3rd Party site such as Amazon, Etsy, Ebay or any other 3rd Party sites.* The ruler is marked in two colors for easy reading. Convenient 1/8", 1/4", 1/2" and 1" lines for precise measuring. The Ruler is made of heavy gauge acrylic and is laser precise. A hanging hole is provided for easy storage.