15 were made, a larger one for sauron scenes, a bigger one as a promotional advertisement, 2 for the hobbit scenes, one is on display in their shop in new zealand. Andy and elijah each got one of the rings made. There isn't anything said about the other ones. The original artisan (jens hensen) died before he got to see them in film.
On their website, the son said the following.
Quote
What has your involvement been in the recent and upcoming Hobbit films?
We are delighted to confirm that we designed and made the gold Lord of the Rings rings used as props for The One Ring, and the ring called Vilya, worn by Elrond in The Hobbit: An Unexpected Journey.
So I guess they made more.
This post was edited by Arsenic_Touch on Nov 24 2016 04:46pm