My stateroom onboard the Norwegian Pearl was much smaller than the staterooms I had on my Carnival cruises. The staterooms on the Carnival ships were 167 sq. ft. (I don't know how that converts to the metric system for our international members here
Good news though. The three Carnival ships you have been on, actually are 185 Sq ft in the inside cabins. With the exception of the 1A bunkbed category which is approximately 160.