This mayonnaise and plate set is in the elegant Tear Drop pattern by Duncan & Miller Glass Company, produced between 1936 and 1955. The ball handled mayo dish is 3 inches high by 4-3/8" diameter at the rim. It's in perfect, crystal clear condition with no scratches or damage.
The plate isn't the official mayo underplate though it was used as one. Actual measurements are 7-7/8" diameter, 10 inches across from handle to handle. It does have a few light scratches - not deep but they are visible when held up to the light.
Duncan Miller Teardrop Mayo Bowl and Underliner Plate