Largest Cruise ship in the world

The world's largest cruise ships(and passenger ships in general) are Oasis of the Seas and Allure of the Seas. These ships belong to Royal Caribbean's Oasis class formerly known as Project Genesis.
 
General Characteristics
Tonnage: 225,282 GT
Length:    360 m (1,181 ft)
Beam:       47 m (154 ft) waterline; 60.5 m (198 ft) extreme
Draught:  9.3 m (31 ft)
Capacity: 5,400 passengers at double occupancy; 6,296 maximum (+ 2,394 crew members)
Speed:      22.6 knots (41.9 km/h; 26.0 mph)

Both ships were ordered in February 2006 at STX Europe shipyard in Turku, Finland.
First in a series, Oasis of the Seas, was completed and turned over to Royal Caribbean on 28 October 2009. Her sistership, Allure of the Seas, left the Turku shipyard on 29 October 2010.
Althought those two ships have identical superstructures, the Allure is 50 millimetres (2.0 in) longer than the Oasis, which is making her technically the largest cruise ship in the world.

Oasis of the seas

Allure of the seas

-Adopted from Maritime connector-