Contains one each of 4-1/2", 6-1/2", 9-1/2" & 12-1/2" squares. Use to cut, square and trim blocks. *Product cannot to be sold on any 3rd Party site such as Amazon, Etsy, Ebay or any other 3rd Party sites, unless approved by the manufacturer.* All of the square rulers in this value pack have the following standard Omnigrid® features: Diagonal angle line, Edge markings for accurate measuring, Laser cut edges for smooth, deep cutting, Patented double-sight lines that show up on light and dark fabrics, Heavy-duty durable acrylic material & Left- and right-hand numbering and angle system