Is there a cruise ship bigger than the oasis of seas?

The Allure of the Seas is the largest cruise vessel currently sailing. It has a sister ship, the Oasis of the Seas, which is 5 cm (2 inches) shorter, and itself was the largest for a couple of years while the Allure was being built. The Freedom of the Seas was the largest from when it was launched in 2006, but overtaken by the Oasis.