The Millennium Falcon is a pretty big ship. But what are its exact dimensions and mass?
Various sources about the dimension of the Millennium Falcon exist. They're not all in agreement, but most of the modern canon sources state that the ship's length is around 35-40m and that its height is around 7.5m, not including its landing struts.
The DeAgostini factbooks seem to have persistent error, identifying the ship as 26.7 metres long.
Corrected in the rebooted magazine series from 2013 onward.
According to Wookieepedia:
Length. 34.37 meters.
Width. 25.61 meters.
Height/depth. 8.27 meters (including lower cannon and upper sensor array)
MGLT. 75 MGLT.
Maximum speed (atmosphere) 1,050 km/h.
Engine unit(s) 2 Girodyne SRB42 sublight engines (heavily modified)
This doesn't directly answer the question, but I thought it was worth mentioning as potentially helpful supplemental info.
Supposedly, the Millennium Falcon at Disney World is constructed at full scale. A little googling finds this reference, which is being a bit wonky at the time I'm posting this. But I did have the privilege of visiting the park myself, and I'm positive I also read this fact someplace while I was there.
Maybe someone can find a better source with more data on the Disney MF?
That said, as to whether the Disney Millennium Falcon is truly what we'd think of as "full scale" (i.e., what we see on screen), I have no way of knowing. Seeing it up close, my initial reaction was that I thought it'd be slightly larger (for instance, it struck me how crammed the cockpit seemed like it would be). But either way, that thing is pretty close to what you'd imagine.
If anyone has some fancy imaging software that's good with measuring distances (or knows a Disney employee who can go measure it), it might make a good point of comparison.
Edit: Following @Valorum's comment below, I completely agree that what we see on-screen inside the ship is vastly incongruent with what we see outside. I only mention the cockpit as an exception to this because that's the one interior section we typically can see from external views.
In any case, it might be interesting (or at least fun) to know how the dimensions of the Disney Falcon match up with the figures quoted in other responses here.