cma-greek-roman-art:

Cup, c. 300-400, Cleveland Museum of Art: Greek and Roman Art

Size: Diameter: 6.9 cm (2 11/16 in.); Overall: 8.5 x 7.1 cm (3 3/8 x 2 13/16 in.)
Medium: glass

https://clevelandart.org/art/1915.549