You will love this special assortment with all of your favorite Halloween colors! Sulky 12 Wt. Cotton thread is 40% thicker than 30 Wt. thread. 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! Recommended Needle Size: 16/100 or 16/100 Topstitch