The Bookworm - A Marker of Books
I have been playing with these Bookworms for my Amigurumi class, they turned out just right and can easily be adjusted to the exact length that you want your book marker. You can also play around with the colours of your choice.
Special skill needed: How to work an adjustable ring for the start and the eyes.
Please notice: All terminology in this pattern is UK emphasized textnot US.