This Tuba ornament glows in the dark after being exposed to light. All artwork is done on the inside of the bulb. (A similar picture is used on the opposite side of the ornament) Our ornaments are glass and measure approximately 2-5/8 inches in diameter. Tops/lids will be either gold or silver depending on what I can find at the time. Each ornament is handcrafted by us and made to order. (possibly 1-2 days extra during our busy season: October, November, and December). If you do not see a design that you want, please send us a message!