From the book: "Wearing this hat makes me feel a little like Miss Marple.  This one is jaunty, easy, and fast to make.  Finish it with a decorative buckle.  I found the plastic one shown here while rummaging through a box of vintage haberdashery supplies at a flea market.  there are pretty new ones available, made of mother-of-pearl or rhinestones.  Either would work well on this hat."