From the book: "These stylish slippers were inspired by little Turkish shoes. They are worked in single crochet in a medium-weight, cotton yarn, used double, so they don't take long to make." Kit includes Yarn. You can purchase with or without the pattern book - if you already own a copy of the book, then you don't need to buy it again! Pattern Book is 'Simple Crochet' by Erika Knight F/5 and H/8 Crochet Hooks are not included. Finished Lengths: 9.5", 10.5" The pattern is written for 2 women's sizes, but is adjustable.