The ranking is largely dominated by Royal Caribbean cruise line with Allure of the seas, Harmony of the seas, Oasis of the seas and Symphony of the seas from which some also belong to the largest ships in the cruise industry. Norwegian cruise line also appears on the list. However, Royal Caribbean's Quantum of the seas isn't included in large popular cruise ships list.
How big are the biggest cruise ships?Allure of the Seas, which used to be the largest ship worldwide (225,280 gross tonnage) until 2016 was dethroned by its sister ship from Royal Caribbean, Harmony of the seas (226,960 gross tonnage) which has a capacity of 6 296 passengers and 2 394 crew members.