Cheese & Cracker: The plate is 12" in diameter. The decoration is also on the cover. The cover is 5-1/2" high. The bottom of the plate is rippled. We have not been able to find any information on this form of decoration or time period for issue.
Tray: This is another example of the Prelude decoration rather than an etch. It is 12" long and 5" wide. It is similar to the many slump glass looking trays, dishes, etc., that Viking made in the 1960s and 70s.