The Sew Easy Magic Seam Marker is a handy little tool which allows you to add 1/4″ seam allowance to any shape that you wish!
It’s so easy and quick to use. Just insert your pencil in the hole. Then roll it carefully along the edge of your template. Also, you will have no problem with adding a seam allowance to irregular & curved templates like circles, clam-shells or drunkard’s paths.