This is the smallest size tumbler made by Cambridge in the Georgian honeycomb pattern. It is light blue or ice blue. The base is ground and marked with a C in a triangle logo. The tumbler is 2 5/8" tall and holds 2 1/2 oz. It is a shot glass or whiskey tumbler. It is in excellent condition with no chips or cracks. Cambridge made Georgian in light blue from 1936-1958. Georgian was also made by Anchor Hocking and Dalzell-Viking, and it can be difficult to determine which company made which piece. Thankfully, this one is signed!