Gary, I'll measure mine for you and then post back. I believe it fits completely within the benches, but why not find out for sure.
Raya
Edited to add: Okay, here we go:
First of all, the table is nearly a square, but is slightly rectangular. It fits down into the grooves on the edges of the benches, so that the top of the table is flush with the tops of the benches when it is lowered. It has a central pedestal type leg. It does not stick out past the front edge of the bench/closet/kitchen enclosure area.
The two corners that face into the trailer are cut off on a diagonal to facilitate getting into and out of the benches when it is in table mode. But of course you could make those rounded or however you wanted to.
The measurement across from bench to bench is 32-1/4"
The measurement from back to front is 28-7/8"
The flat part of each diagonal corner cut is 10-1/2"
The corners of the cut off diagonals are a bit rounded, but they start about 7-1/2" in from where each corner would be (i.e. before you cut them, measure in about that far along the edges and make your diagonal cut between them - face should be about 10-1/2" then when you are done.
Edit #2: I remember you were asking about possibly using
Scamp cushions. I don't think it would be a good enough fit to make it worthwhile, because the Scamps are much more rounded at the ends (hence, so are the cushions). Where the
U-haul is more square with rounded off corners, the
Scamp is more "pooched out" in the middle.