A 12-1/2'' x 12-1/2'' square ruler helps you make sure blocks are square. Easy to see black-and-yellow markings at 1/8'' and 1/4'' intervals. Has lines for 30-, 45-, and 60- degree cuts. Perfect for quilters working with 12'' 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.*