Finally, a tool and technique that will give you high success adding fabric corners to basic shapes. With your new Corner Pop tool, you will be able to trim rather than mark, add an oversized replacement triangle and then square everything to a perfect size. In twenty two different sizes - whole, half and quarter inches. Increased success without undue stress for every level of quilter. What's not to love! Ruler size: 9½" x 9½". Twenty two size options: from ¾" to 6" finished size in quarter inch increments.