I started collecting info for a little side project on the actual length of the Reboot E and Vengeance. I know that the desingers said she was supposed to be the same as TOS Enterprise and that Abrams decided to upscale her for whatever reason late during production. I also know that the design itself (like number of decks etc.) would correspond with 300 meters for that same reason. Even if Abrams worked on a 700m basis, I have the strange feeling pretty much everything on screen contradicts him and points towards 300 meters. But is there any more on-screen evidence supporting either claim? Example: after Vengeance crashed, Cumber-khan jumps out of the bridge window onto the saucer (across that gap in the hull in fron of the bridge). Sulu says "he just jumped 30 meters". If you measure the top view, that would put the Vengeance at more or less 600 meters (and Enterprise at half that length).