If you have an old wire bird cage and need to fit it with vintage seed and water cups, this is what you are looking for. This old glass seed cup is marked U.S.A. on the front and has a delightful molded pattern of curving lines over the surface. The back has a tab that fits between the cage wires to attach it to the cage. The cup measures 3 inches tall and is 2 1/8 inches wide. The tab on the back measures 13/16 inches wide and behind this tab is an oval that is 1 3/8 inches wide. There is a small amount of rust staining on one side of the back tab from use and there is a very small corner chip on the tab as well. This is a very nice seed cup for your antique or vintage bird cage.