An important year of adulthood, having shot glass 21st birthday party favors is especially meaningful. With a variety of birthday graphics and imprint colors, you are sure to find one that you like. Each glass measures 1 7/8" wide and is 2 3/8 tall with a 1 3/4 ounce capacity. It also has a nice thick solid glass bottom. Although glasses come bulk packed, you may buy a white window box with a bow for an additional fee.