took ratio of the dishes:
Measured three dishes in the picture.
center solid, right solid, and rear mesh.
they may be:
6' , 7½', 14¾'
or, perhaps:
8', 10', 19¾'
edit: yea, if the big one is 24', that could work, I suppose...
10', 12', 23½'
Didn't have any fixed object of known size to measure.
Even the fellow at the bottom of the shot didn't have his feet showing.
There are a lot of support rings in the big dish, so that might help identify its size.