One of two Heisey Octagon patterns, this one was made 1925-1937 in Crystal, Flamingo, Moongleam and Hawthorne (shown). Most pieces are not marked, but some of the larger ones may have the Diamond H on the handles. In this case, the ladle is marked, but the mayo isn't.
The mayo measures 3 1/2" high and 5 3/8" across not counting the handles.