Compared to the Royal Caribbean Oasis of the Seas, the Mariner of the Seas is 38% smaller in terms of overall tons. Coming in at 1,020 feet long and 157 feet wide, it's roughly the length of 2.8 football fields, as wide as 3 tractor-trailers and the same height as a 14-story building. The Mariner of the Seas is considered a medium size ship. It's 6 years older than the Oasis of the Seas, which was built in 2009 and renovated in 2020. The Royal Caribbean Mariner of the Seas was built in 2003.
