If you're trying to find a list of Royal Caribbean ships by size, we have a complete list.
From the smallest (Grandeur of the Seas) to the Star of the Seas (debuting later this year), the difference between ship size can be substantial.
We're measuring ships by a metric known as "Gross Tonnage" because the layout of the ship varies greatly. The actual measure of a ship's weight is its displacement, literally the amount of water that is pushed away on all sides (displaced) while the ship floats within it
So whether you have a passing interest in knowing how big each ship is in Royal Caribbean's fleet, or want to prove your friend wrong that you know which ship is the biggest, here is a look at all the Royal Caribbean cruise ships ranked from biggest to smallest.
Royal Caribbean ships by size
1. Icon of the Seas size
Icon of the Seas is the world's largest cruise ship and the first of the Icon Class. Launched in January 2024, it has a gross tonnage of 250,800, length of 365 meters (1,198 feet), and spans 65 meters (213 feet) in width. The ship can accommodate 5,610 guests at double occupancy and up to 7,600 at maximum capacity, along with a crew of 2,350. The Icon of the Seas total number of staterooms is 2,827 and has 20 decks.
Gross Tonnage: 250,800 GRT
Length: 1,198 feet long
Passengers: 5,610 (double occupancy)
2. Star of the Seas size
Star of the Seas is the second Icon Class cruise ship, scheduled to launch in August 2025. The new ship is similar in size to Icon of the Seas. It will have a gross tonnage of 248,663, measure 364 meters (1,196 feet) in length, and span 66 meters (219 feet) in width. Star will accommodate 5,610 guests at double occupancy and up to 7,600 at maximum capacity, supported by a crew of 2,350. Star of the Seas features 2,805 staterooms across 20 decks.
Gross Tonnage: 248,663 GRT
Length: 1,196 feet long
Passengers: 5,610 (double occupancy)
3. Utopia of the Seas size
Utopia of the Seas is the sixth Oasis Class cruise ship and the biggest of the Oasis Class ships. Utopia launched in July 2024, and measures 236,473 gross tons in size. The length is 362 meters (1,188 feet) and has a width of 66 meters (217 feet. The ship has a guest capacity of 5,668 at double occupancy, and up to 7,958 at maximum capacity, supported by a crew of 2,290. Utopia features 2,834 staterooms across 18 decks and is the first Oasis Class vessel powered by liquefied natural gas.
Gross Tonnage: 236,860 GRT
Length: 1,188 feet long
Passengers: 5,668 (double occupancy)
4. Wonder of the Seas size
Wonder of the Seas was built in 2022, and is the fifth ship in the Oasis Class. Her total size is 236,857 gross tons, and measures 362 meters (1,188 feet) in length and 66 meters (217 feet) in width. The ship has a capacity of 5,734 guests at double occupancy and up to 6,988 at maximum capacity, along with a crew of 2,300. There are 2,867 staterooms across 18 decks.
Gross Tonnage: 236,857 GRT
Length: 1,188 feet long
Beam: 210 feet wide
Passengers: 5,734 (double occupancy)
5. Symphony of the Seas size
The fourth Oasis Class ship is Symphony of the Seas and measures 228,081 gross tons, 362 meters (1,188 feet) in length and 66 meters (217 feet) in width. She started cruising in March 2018. Symphony holds 5,518 guests at double occupancy and up to 6,680 at maximum capacity. About 2,200 crew members work on the ship. The Symphony of the Seas total number of staterooms is 2,759.
Gross Tonnage: 228,081 GRT
Length: 1,188 feet long
Beam: 215.5 feet wide
Passengers: 5,518 (double occupancy)
6. Harmony of the Seas size
Harmony of the Seas has a construction date of 2016, becoming the third Oasis Class ship. It's size is 226,963 gross tons, making it the sixth biggest ship in the fleet. It has a length of 362 meters (1,188 feet) and width of 47 meters (154 feet). There are 2,747 staterooms onboard, which can accommodate up 5,479 guests at double occupancy. If the ship reaches maximum capacity, there would be 6,687 passengers booked. A crew of 2,300 works onboard.
Gross Tonnage: 226,963 GRT
Length: 1,188 feet long
Beam: 215.5 feet wide
Passengers: 5,479 (double occupancy)
7. Oasis of the Seas size
The first Oasis Class ship, Oasis of the Seas changed the cruising world when it began offering cruises in December 2009. At the time, it was the largest ship in the world. It has a gross tonnage of 226,838, length of 361 meters (1,187 feet), and width of 66 meters (217 feet). The maximum capacity is 6,780 passengers, but the double occupancy rate is at 5,602 guests. There are 2,801 staterooms across 18 decks.
Gross Tonnage: 226,838 GT
Length: 1,187 feet long
Beam: 215 feet wide
Passengers: 5,602 (double occupancy)
8. Allure of the Seas size
Launched in December 2010, Allure of the Seas is the second Oasis Class ship. It got a major overhaul in 2025, and has a gross tonnage of 225,282. Her length is 362 meters (1,188 feet) and width is 47 meters (154 feet). Over 100 new cabins have been added to Allure of the Seas during her amplification, bringing the total number up to 2,859. It's double occupancy rate is 5,718, plus a 2,103 crew members.
Gross Tonnage: 225,282 GRT
Length: 1,187 feet long
Beam: 215 feet wide
Passengers: 5,718 (double occupancy) [30 new cabins added in 2025]
9. Spectrum of the Seas size
Spectrum of the Seas was the first Quantum Ultra Class ship, having joined the fleet in April 2019. It is 169,379 gross tons. The ship measures 347 meters (1,139 feet) in length with a width of 41.4 meters (136 feet). It has a capacity of 4,246 guests at double occupancy and up to 5,480 at maximum capacity. About 1,551 crew members work onboard. There are 2,137 staterooms on Spectrum of the Seas.
Gross Tonnage: 169,379 GRT
Length: 1,139 feet long
Beam: 135 feet wide
Passengers: 4,256 (double occupancy)
10. Odyssey of the Seas size
Odyssey of the Seas launched in July 2021. It has a gross tonnage of 167,704. The ship measures 347 meters (1,138 feet) in length, and has a width of 41 meters (136 feet). The ship accommodates 4,198 guests at double occupancy and up to 5,510 at maximum capacity, with a crew of 1,663. Odyssey of the Seas features 2,105 staterooms. It is the second Quantum Ultra Class cruise ship.
Gross Tonnage: 167,704 GT
Length: 1,138 feet long
Beam: 135 feet wide
Passengers: 4,284 (double occupancy)
11. Ovation of the Seas size
Ovation of the Seas entered service in April 2016. Ovation has a gross tonnage of 167,800, a length of 348 meters (1,142 feet), and a width of 49 meters (161 feet). The ship has a double occupancy capacity of 4,180 guests, and up to 4,905 at maximum capacity. 1300 crew members work onboard. Ovation of the Seas has 2,091 staterooms across 16 decks.
Gross Tonnage: 168,666 GRT
Length: 1,141 feet long
Beam: 136 feet wide
Passengers: 4,180 (double occupancy)
12. Anthem of the Seas size
Launched in April 2015 as the second Quantum Class ship, it's gross tonnage is 168,666. The ship's length is 348 meters (1,142 feet), and width is 41 meters (136 feet). Anthem's regular capacity at double occupancy is 4,180 guests, with up to 4,905 at maximum capacity. A crew of 1,300 work onboard. Anthem of the Seas features 2,091 staterooms across 16 decks.
Gross Tonnage: 168,666 GRT
Length: 1,141 feet long
Beam: 136 feet wide
Passengers: 4,180 (double occupancy)
13. Quantum of the Seas size
Quantum of the Seas is the first Quantum Class cruise ship, beginning sailing in November 2014. At 168,666 gross tons, it is 348 meters (1,142 feet) long and 41 meters (136 feet) wide. The ship accommodates 4,180 guests at double occupancy and up to 4,905 at maximum capacity, supported by a crew of 1,500. Quantum of the Seas features 2,094 staterooms across 16 decks.
Gross Tonnage: 168,666 GRT
Length: 1,141 feet long
Beam: 136 feet wide
Passengers: 4,180 (double occupancy)
14. Freedom of the Seas size
The first in the Freedom Class, Freedom of the Seas started offering cruises in June 2006. It was the biggest ship in the world at her debut, with a gross tonnage of 156,271. Freedom has a length of 338.8 meters (1,111 feet), and a width of 56 meters (185 feet). Freedom of the Seas has 1,963 staterooms and has 15 decks. The ship's passenger load is 3,926 guests at double occupancy and up to 4,515 at maximum capacity. There are 1,365 crew members.
Gross Tonnage: 156,271 GT
Length: 1,111 feet long
Beam: 185 feet wide
Passengers: 3,926 (double occupancy)
15. Liberty of the Seas size
Gross Tonnage: 154,407 GRT
Length: 1,112 feet long
Beam: 185 feet wide
Passengers: 3,798 (double occupancy)
16. Independence of the Seas size
Gross Tonnage: 154,407 GRT
Length: 1,112 feet long
Beam: 185 feet wide
Passengers: 3,858 (double occupancy)
17. Navigator of the Seas size
Gross Tonnage: 139,999 GT
Length: 1,020 feet long
Beam: 161 feet wide
Passengers: 3,388 (double occupancy)
18. Mariner of the Seas size
Gross Tonnage: 139,863 GRT
Length: 1,020 feet long
Beam: 127 feet wide
Passengers: 3,344 (double occupancy)
19. Explorer of the Seas size
Gross Tonnage: 137,308 GRT
Length: 1,020 feet long
Beam: 157.5 feet wide
Passengers: 3,286 (double occupancy)
20. Adventure of the Seas size
Gross Tonnage: 137,276 GRT
Length: 1,020 feet long
Beam: 157 feet wide
Passengers: 3,114 (double occupancy)
21. Voyager of the Seas size
Gross Tonnage: 137,276 GT
Length: 1,020 feet long
Beam: 157.5 feet wide
Passengers: 3,602 (double occupancy)
22. Radiance of the Seas size
Gross Tonnage: 90,090 GRT
Length: 962 feet long
Beam: 106 feet wide
Passengers: 2,143 (double occupancy)
23. Brilliance of the Seas size
Gross Tonnage: 90,090 GRT
Length: 962 feet long
Beam: 106 feet wide
Passengers: 2,142 (double occupancy)
24. Serenade of the Seas size
Gross Tonnage: 90,090 GRT
Length: 965 feet long
Beam: 106 feet wide
Passengers: 2,143 (double occupancy)
25. Jewel of the Seas size
Gross Tonnage: 90,090 GRT
Length: 962 feet long
Beam: 106 feet wide
Passengers: 2,191 (double occupancy)
26. Enchantment of the Seas size
Gross Tonnage: 82,910 GRT
Length: 989 feet long
Beam: 105.6 feet wide
Passengers: 2,252 (double occupancy)
27. Rhapsody of the Seas size
Gross Tonnage: 78,491 GRT
Length: 915.35 feet long
Beam: 105.6 feet wide
Passengers: 1,998 (double occupancy)
28. Vision of the Seas size
Gross Tonnage: 78,340 GT
Length: 915 feet long
Beam: 105.6 feet wide
Passengers: 2,050 (double occupancy)
29. Grandeur of the Seas size
Gross Tonnage: 73,817 GRT
Length: 916 feet long
Beam: 105.6 feet wide
Passengers: 1,992 (double occupancy)
What is Royal Caribbean's biggest ship?
The biggest Royal Caribbean ship is Icon of the Seas, which is also the world's biggest cruise ship.
The maximum capacity for Icon of the Seas is 7,600, and the ship measures 248,663 gross tons. That means you'll find a giant ship with so much to do onboard. There are new types of cabins, a water park, new neighborhoods, and plenty of activities in-between.
Icon of the Seas will remain the biggest cruise ship in Royal Caribbean's fleet even when the second Icon Class ship launches in 2025, Star of the Seas.
What is the smallest Royal Caribbean ship?
The smallest Royal Caribbean cruise ship is Grandeur of the Seas, and she is also the oldest Royal Caribbean cruise ship.
Grandeur of the Seas is just 73,817 gross tons and has a passenger capacity of 2,446.
Launched in 1996, Grandeur was originally going to be sold off, but the cruise industry shutdown of 2020 meant she'd stick around a bit longer.
The top deck features one main pool and a few hot tubs. Nearby is the adults-only Solarium, which has another pool and hot tub. There is also a rock climbing wall on the aft of the ship. This is typical of a cruise ship built almost 30 years ago.
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