I'm already fairly certain that Genie is the same width as Circus & Star Race, which is 3" wider than games like HH. So I think I have that much nailed down.
& I'm assuming that for length that Genie might also be the same as system 80's, although I really have no clue, it just looks the same to me in pics.
Really what I'm looking for is a playfield measurement, but with this info maybe I can figure that out.