The angle of those lights makes it impossible for them to run alone the deck of the hangar. Look at the angle of the secondary hull to the camera. The deck would have to be tilted up 45 degrees or more.
As to the primary hull diameter, this is probably determined by the sizes of the windows and airlocks, which seem to suggest ships about the same size as what we've seen before.
As to the primary hull diameter, this is probably determined by the sizes of the windows and airlocks, which seem to suggest ships about the same size as what we've seen before.