Iris Nylon Crochet Thread Size 18 197 Yards has a lustre and twist unlike any other product. It produces fantastic stitch definition as well as a hand with full but flexible body. Nylon's key attributes are shine, durability and receptiveness to dyes, the colors are vivid! Suitable size 18 projects would include purses, totes, placemats, home decor items, cell holder, flowers, and more. 100% nylon. 197 yards. Machine wash, dry flat.