Size of cabins on Magellan

Our cruises are usually with RCI and our usual cabins are inside which have a floor space of 147sq ft.

Are all inside cabins on Magellan the same size? I have received conflicting information. We really do not wish to have a cabin smaller than RCI, where we have twin beds so making the most of the available floor space.

According to the cruise critic review, inside cabins vary from 135 to 163. The review can be found here

http://www.cruisecritic.com/reviews/review.cfm?ShipID=1029

and look under the tab marked "cabins."

Thank you.