What's the can a full size mattress fit in a nissan rogue?

The answer to Your question depends on what You mean by "fit". If You're asking if a Nissan Rogue is capable of moving a full size mattress, then the answer is most likely yes -- however, it will have to be placed diagonally and potentially folded. The most recent model year of the Nissan Rogue -- 2020 -- boasts A68.9 inch by 51.2 inch cargo area. A full size mattress measureS53 inches wide by 75 inches long. This will make it just a tad too long and wide to fit in the cargo area if it's laid flat -- this is my interpretation of Your question. However, You will be able to place it slightly sideways in order to transport a mattress -- just don't plan on lying on it comfortably while its back there.