We've said it many times before: Choosing a stateroom on one of today's mega ships is a daunting task. And it's particularly difficult if you are booking a cabin on Royal Caribbean's newest build, Harmony of the Seas — the biggest ship in the world. At full capacity, Harmony of the Seas can carry 6,780 guests in 2,747 staterooms and suites spread across more than two dozen categories. From single studio staterooms to a family suite that can sleep up to 14, the cabins on Harmony of the Seas come in all shapes and sizes with a wide range of prices. Harmony of the Seas is also the first Oasis-class ship to have virtual balcony staterooms (the 85 interior cabins have floor-to-ceiling HD screens displaying a live feed of what's happening outside). Ready to set sail? We've decoded the deck plans to make choosing your accommodations easier. Check out our video guide above.