We made one of these fun necklaces for a friend several years ago and ever since, we've had a tons of requests for them. We took our own Happy Birthday 6 Stamp and made a necklace with charms and fun fibers. The necklace including the stamp measures about 40 inches, but it can be shortened easily by just tying a knot in the back.
The best part about the whole thing is that the recipient ends up with a real mounted rubber stamp! Now, how much fun is that?
The charms include a little glass bunny with a pink nose and ears, a hand made mermaid charm, a little guitar, a running dog (greyhound) and an artist's palette.