GÜTERMANN Cotton 12 is a mercerized cotton thread for makers who want a thicker, cotton-texture stitch on medium to heavy fabrics and many other materials. Each 200 m (219 yd) spool in Dark Steel Grey (Colour 1295) works for hand sewing or machine work when you need strong seam closure or bold decorative lines. Use a universal needle in the NM 90–100 range, and test stitch length and tension to keep the stitch line smooth and well defined.