The most popular quilting ruler! The 6 1/2 Triangle Square Up Ruler makes perfect half triangle squares and quarter triangle squares in sizes up to 6 1/2 inch. Fully illustrated and detailed instructions are included. The ruler is marked in two colors for easy reading. Convenient 1/8 inch, 1/4 inch, 1/2 inch and 1 inch lines for precise measuring. The Ruler is made of heavy gauge acrylic and is laser precise. Watch as Eleanor teaches her easy technique for Half Square Triangles with the Quilt in a Day Triangle Square Up Ruler. This video clip "Hens and Chicks" is from the popular Quilt in a Day video series "Quilt Blocks on American Barns."