Don't know. I just like the look as is. If it were much larger, it would probably be too heavy for most folks due to its solid back/sides construction. That was an issue for with with the big LP bass.
There's nothing about the exact dimensions on the specs pages, but the description of the Midtown Standard P-90, which replaces last year's Midtown Standard and Custom guitars, says "This great new guitar maintains its predecessors' trimmed-down and more player-friendly body size that still emulates the lines of Gibson's classic archtops..."
The page for the Gibson Custom ES-335 Dot Figured Gloss says "Regardless of color, the ES-335 retains its classic proportions: 16 1/2-inches wide, 20-inches long, and 1 3/4-inches deep..." Your Midtown isn't nearly that big, is it?