Diameter: Approximately 2.6cm Please forgive any errors as this was measured by an amateur. It's a flower design against a red glass background. There is an "ITALY" stamp on the back. It has a sense of aging. Please refer to the photos. *This item has been stored at home for a long time and is a used item. Please refrain from purchasing if you are nervous about this. *We are looking forward to purchases from those who understand vintage, used, retro, and antique items. *Colors may appear slightly different depending on your monitor.