|Clamshells are created when half-circle shapes are connected and layered in an offset grid. But forget the curved piecing – there’s an easier way! Using precut iron-on interfacing, we will glue the seam allowance to prepare the shapes for stitching. Make it a relaxing handwork project to stitch by hand or quickly and easily machine stitch the curve. The precuts fit perfectly on a 2-1/2” strip of fabric, making this an ideal “jelly roll” project.