Originally Posted by
TURIN
How much longer than a 777-300 is the 777X?
It depends on which 777X you're referring to. The 777-8X is actually about 10 ft. shorter than the -300ER, the -9X is about 10 ft. longer (so basically 3 seat rows either way).
The 777X is retaining the same outside fuselage diameter as the original 777, but the fuselage structure is being reworked to add several inches of internal width so 10 across should be a little less painful on the X.