The simplest one I found was this one
How about just using nail polish to decorate the washer? Charms could be added, or extras as above.. but this is fun. And with all the sparkly and fabulous nail polishes available in EVERY color, the options are limitless in this easy variation of the washer jewelry.
There are so many other variations out there... I have included just a bit more below.
Metal stamps are another addition that could be neat. Don't you love this ribbon on this one??