i made some measurements on a 2012 with a metric/english tape, so mixed units here.
The width of the frame rail was 70mm.
The height of the frame rail above the ground was 15" on one side and 15-1/8" on the other (didn't check tire pressure); the lowest point was at the bottom of the shock, 5-1/2" above ground.
The centerline spacing was 37-3/4" as best i could determine without removing the plastic aero shield.
All my measurements for height and width were made in the vicinity of the shock and spring area with the green circle in the picture.
That trailer hitch seems odd, there are no mounting holes on the side of the frame rails on the right hand side.
i have an un-installed 2" hitch that was on the floor of the back seat of the car when i got it. It's built like a truck hitch for hauling massive loads--it must weigh a 100 lbs and is way overrated for the size of the leaf and its brakes and the loads it could haul. i think the previous owner couldn't lift it out after someone loaded it into the car for her.