Here are some examples, they've all been hand-made and hand-drawn so are completely one of a kind.
To see larger pictures go here http://www.facebook.com/album.php?aid=18441&id=128145513895234
All necklaces are made of thick hard plastic, I think it's about 4mm thick.
If you are interested in any drop me an e-mail at firstname.lastname@example.org :)
I can also draw something specifically for you if you have something in mind.