I use Princess website deck plan for ship I want. I decide on the area- aft, mid aft, mid, forward, click on any cabin, see the size, go to the cabins around it, click on to get the size, go one deck up or down do the same. Check the same category, certain cabins might be different sizes.
ie - on the Island, I found PR aft balcony cabins were slightly bigger. Cabins are the same size but it is balcony size that is the difference.
- I have found on the aft cabins on Ruby, Sky and other ships, the cabins are bigger 250 sq ft vs 222 sq ft for cabins across from the elevator.
- on the new Sun/Star all the balcony cabins are listed at the same size.