The end seat sections are 42.5" W, 38.5" H, and 22" D (seat section).  Middle seat T-section has same height and width, but total depth is longer due to two seats being back to back.
 
Plan your 1950s sock hop with this original black and white boomerang pattern diner booth! 
 
Two single back seat booth sections and one doubleback booth section are available.  These could be configured so that you have one booth or two booths back to back.  Booths are built to be against a wall so one side is unfinished.  Each seat fits two people.
 
Price is per seat, but if you rent the whole set, you're getting a deal at $300 total.
 
Don't forget the formica and chrome table!