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. 50mm x 100mm x 4.5mm with lavishly illustrated instructions. Size Large for pieces with batting in it, e.g. Magic Square project or any other quilt-as-you-go projects. Size Small for pieces without batting in it.