The ship is a little over three hundred feet long. I'm determined not to go the "Star Wars" route - a lot of nernies - because I prefer the pre-2001 look of ships like the Enterprise or other science fiction of the 1950s and 1960s ("Voyage To The Bottom Of The Sea," "Forbidden Planet" and so forth). So really the only effective way to suggest scale is with windows. This is problematic too because of the ship's internal layout.
Eventually it'll probably be up to a few windows and scaling of the hull plates. The look of "Colonial One" on the new Battlestar Galactica may be a useful reference as well.