The following image shows the mirror my girlfriend and I modeled.
We bought an ordinary mirror (11" x 28,5") with wooden sides and modeled clay onto
the sides. The sides are about 1,5" wide.
Because we had a very small oven at that time in which we had to harden the clay in,
we modeled the sides in pieces. Each piece is bordered by some Celtic
knotwork, the knotwork itself being pieces too.