This is an ideal marker. It marks while simultaneously making a crease. It leaves no residue on the fabric. Markings can be seen on both the front and the back of the fabric.
Seam Ripper White Plastic
The slim tip slips under the threads and easily cuts threads on fabrics or button holes. Includes a non-slip screw-on handle. Use for ripping out seams, basting threads and cutting thread under buttons.