Multiple use hot iron transfer templates. The Super Quick way to make Half-Square Triangles No lines to draw and no paper to tear off. Quick Easy and Accurate. 6 multiple use sheets in package To use simply iron template on to wrong side of fabric, place fabrics together right sides together sew on stitching lines, cut on solid lines, press open and start piecing. SQangles are sold by the Finished size (the size it is after it is sewn into the block). To determine what size SQangles to buy check your pattern for the FINISHED size it requires. If you prefer room to square it up use the next larger sizes. Transfer ink is permanent on most fabrics.