OH...MY...GODS!!! She's perfect!!! You have no idea how incredibly exciting it is to see this. I'd be jumping up and down with joy right now if I still had both legs!
Length is 2455 meters, and I've attached the size chart I did when I first drew her for Ryan. Originally Ryan was looking for something comparable to a Super Star Destroyer for the BSG universe but once we looked at a couple rough drafts we realized that that was just way too absurdly big, so I scaled her to compare to the Pegasus as the Pegasus compares to the Galactica, roughly twice the volume. As for her name being the same as the freighter in the RTF, there are precedents for civilian and military ships having the same name.