This set includes 6 perfectly coordinated colors of Sulky 12 Wt. Cotton Blendables thread on 300 yard King size spools. These threads are great for decorative stitching and hand embroidery. These were specially chosen to go with the Crossroads Denim by Amy Barickman Westport Collection. Sulky 12 Wt. cotton thread is 40% thicker than our 30 Wt. cotton thread. All of our cotton threads are premier quality, long staple, highly mercerized Egyptian cotton with a matte finish to create a soft, warm, natural look and feel.