Thimblelady's revolutionary New Design for whipstitch hand piecing! No pinching pain on the non-sewing hand. No paper basting needed. Perfect stitching simply beyond the best of your hands and eyes combined! Go to Video page to see how it works for yourself. Size S regulators: 25mm x 100mm x 4.5mm are designed to piece quilt tops (without batting inserted when piecing). Size Large for piecing with batting in it, e.g. Magic Square project or any other quilt-as-you-go projects. Each set of regulators come with lavishly illustrated instructions.