According to Boeing:
777-200ER is 209ft 1in (63.7 m)
777-300ER is 242ft 4in (73.9 m)
777-9 is proposed at 250ft 11in (76.5m)
interestingly, the 747-8i is 250ft 3in (76.25m)
Edit: the 777-8 is shorter at 228ft 2in (69.55m)
Last edited by underfire; 1st Oct 2013 at 22:14.