Ok I found a couple pics, but I don't have dimensions….so not as much help I believe this one was roughly 6' long though and maybe 30" wide. It was made a specific size to replace a table in an alcove.
Looking at the pic of the bottom I'm going to guess it's roughly 14" or so overhang. I think I layed it out by eye before cutting the stretcher to length.
Nothing fancy of course, but I figure it didn't come out half bad for a hack like me
good luck,
JeffD