EZ Quilting Acrylic Templates are thick and sturdy, so they'll stand up to years of wear. Easy Angle Acrylic Template cut triangles, squares, and attic window shapes all from the same strip of fabric. Cuts half square triangles from 1/2 inch to 6 inch finished size. Built in 1/4 inch seam allowance. Ideal for use with a rotary cutter. This triangle shaped ruler is approximately 9 1/4 x 6 7/8 x 6 1/2 inch.