This necklace comes with a Stephen King book- you can choose from the five I have available, or get a custom necklace. The book it comes with will hang loosely on the chain, but if you buy additional books with clasps, you can clasp them wherever you wish on the chain.
There are two chain sizes. The long chain is 27″, long enough to fit over your head without a clasp (most likely, so a clasp is included anyways). The short chain is 18″.