The base is 12.75 inches in diameter, 1.25 inches high.
The
tray for cups is 11 inches in diameter on the bottom, 12.4 inches at
the top. Underneath, it says Artistic Churchware, made in USA, RW-500-A
and 195.
The removable cup-holder insert ring is 11 inches in diameter, 1/2
inch on the edge.
The lid is 11 inches in diameter, 1.5 inches on the
edge. Height without the cross is about 1.8 inches. The cross is 1.6
inches high, 1.4 inches wide, probably aluminum. The cross can be
removed; a screw holds it on from underneath.
Photos show the tray assembled, disassembled, and undersides.
All these things when new cost about $115
These trays have been used, but probably not very often, and taken good care of.
I also have some bread trays.