These arrived today and they turned out really nice. Kathy Loewenstern from California made them. http://www.kathylo.com.
Double sided, so functionally, they are like 2 pendants in 1. Waterproof, but I would not recommend wearing it into the pool.
They are sterling silver, with a waterproof coating. They come with a 16 inch sterling silver chain.
3 sizes are available- small, medium, and large.
the small is 5/8 in square. Medium is 3/4 in square. Large is 1 inch square.
I listed a large one in the store, and will list the other 2 sizes a bit later.