Make a more beautiful, bolder statement on your quilting, serging, embroidery, handwork and other decorative projects with Sulky 12 Wt. Cotton thread, which is 40% thicker than 30 Wt. All Sulky All Sulky Cotton Threads are premier quality, long staple, highly mercerized Egyptian cotton with a matte finish to create a soft, warm, natural look and feel. You will fall in love with our color selection! Storage is tidy on a 50yd snap-end spool with no loss of color identity. Recommended Needle Size: 16/100 or 16/100 Topstitch.