Stained Glass Robin Decoration. This one is brown glass using Tiffany style foil techniques, available all year round as people just love robins! They are cute and cheerful and hang beautifully off a traditional Christmas tree or just hanging in your window. 2.5″ x 3.5″ (7cm x 10cm) approx. Two colours available, robin brown and Christmas gold, please select the correct version! Why robins at christmas?