Just MASSIVE HUGE at best.
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http://www.cruisediva.com/qm2_9.htm
Some comparisons:
QM2 is five times longer than Cunard's first ship, Britannia (230 ft. )
QM2 is more than twice as long as the Washington Monument is tall (550 ft. )
QM2 is 147 feet longer than the Eiffel Tower is tall ( 984 ft. )
QM2 is more than 3 ½ times as long as Westminster Tower (Big Ben) is high (310 ft. )
QM2 is only 117 feet shorter than the Empire State Building is tall (1248 ft. )
QM2 is more than three times as long as St. Paul's Cathedral is tall (366 ft. )
QM2 is as long as 36 double-decker London buses (31 ½ ft. each)
QM2's whistle will be audible for 10 miles.
Ship Accommodations:
Standard cabins measuring a comfortable 194 square feet, some with spacious eight-foot-deep balconies.
Deluxe cabins featuring balconies and measuring 291 square feet.
Seventy-eight suites including balconies which measure 388 square feet.
Six penthouses at 570 square feet featuring butler and concierge service and private balconies.
Four deluxe penthouses overlooking the bow measure between 861 and 1,076 square feet can be combined together and connected with two of the suites to create a single luxurious living area totalling more than 5,000 square feet with balcony and concierge service.
Five duplex apartments which are two stories high and measure more than 1,650 square feet. Overlooking the stern, breathtaking sea views are provided via a two-story glass wall. Each apartment features its own gymnasium and balcony and butler and concierge service. For the ultimate in luxury, duplex apartments can be connected to a penthouse to create a stunning 2,220-square-foot living space, an accommodation choice simply unrivalled on any other passenger ship.

http://www.cruisediva.com/qm2_9.htm
Some comparisons:
QM2 is five times longer than Cunard's first ship, Britannia (230 ft. )
QM2 is more than twice as long as the Washington Monument is tall (550 ft. )
QM2 is 147 feet longer than the Eiffel Tower is tall ( 984 ft. )
QM2 is more than 3 ½ times as long as Westminster Tower (Big Ben) is high (310 ft. )
QM2 is only 117 feet shorter than the Empire State Building is tall (1248 ft. )
QM2 is more than three times as long as St. Paul's Cathedral is tall (366 ft. )
QM2 is as long as 36 double-decker London buses (31 ½ ft. each)
QM2's whistle will be audible for 10 miles.
Ship Accommodations:
Standard cabins measuring a comfortable 194 square feet, some with spacious eight-foot-deep balconies.
Deluxe cabins featuring balconies and measuring 291 square feet.
Seventy-eight suites including balconies which measure 388 square feet.
Six penthouses at 570 square feet featuring butler and concierge service and private balconies.
Four deluxe penthouses overlooking the bow measure between 861 and 1,076 square feet can be combined together and connected with two of the suites to create a single luxurious living area totalling more than 5,000 square feet with balcony and concierge service.
Five duplex apartments which are two stories high and measure more than 1,650 square feet. Overlooking the stern, breathtaking sea views are provided via a two-story glass wall. Each apartment features its own gymnasium and balcony and butler and concierge service. For the ultimate in luxury, duplex apartments can be connected to a penthouse to create a stunning 2,220-square-foot living space, an accommodation choice simply unrivalled on any other passenger ship.