All Your Favorite Hats Crochet Book- Crochet and Knit Hats. Heads up, these 10 projects are perfect as gifts or for bulking up your cold weather wardrobe. With easy to intermediate designs, find all the necessary information you need to make: beanies, bun hats, cable knit hats, brimmed hats, slouch hats, and more. Use with size 3 light, 4 medium, 5 bulky, and 6 super bulky weight yarns. Pocket size book has 48 pages in a softcover.