45 degree diamond shape. Cut 45 degree diamonds. Can be cut in a range from 1inch to 3.5inch. Great for sewing, crafting, also scrapbooking. Best if used with other items from the EZ quilting range. EZ Quilting: 45 Degree Diamond. This clear acrylic template aids in cutting perfect 45 degree diamonds. Simply line it up as indicated by the markings to cut diamonds ranging in size from 1 to 4 inches.