Hi Guys,
Latitude is not a real ship.. But she's 314 mtrs long, 46 mtrs wide and has a draft of 18 mtrs.
But as for the real ones in this poll (which is a bit of a weird one as you can just look up the specs)
Titanic, Brittanic and Olympic are sister ships, and although there is a slight difference, they are all just about the same size. (roughly 269 long, 28.5 wide and with a draft of 10.5 mtrs)
QM2 is bigger than the rest though. 345 mtrs long, 41 mtrs wide and a draft of 10 mtrs So QM2 is the biggest. (latitude is slightly wider, but overall the QM2 is bigger)
Regards,
Fred