Though we don't have official orthographic five-views of the CGI, it nevertheless seemed odd that a vehicle so often surrounded by people of known height should be so mysterious.
So, I tried to do some measuring. Starting with the structure of this low-poly model, altering the proportions and heavily reworking the nose, windshield, and upper rear* (the model as built relied heavily on texturing to 'cheat' the appearance of correct structure), I tried to make the vessel correspond fairly well to Raul Quiles' five-view here and to my own eyeball appraisal, notably and especially a few comparisons to folks standing around the door.
Thus, I think I have a different answer as to the ship's length, being about 8 meters.



(* I still have work to do on the area of the engine top if I wanted the model to look more accurate to the canon vessel, but it'll do for this purpose.)
The SketchUp model itself can be made available by request.