Mine is a 25RL which I presume means and I have measured inside front wall to the back inside wall is 25 foot while the RL means rear living. I have measured out side length and it come to 27ft 8inches.
2001 Ford F-350 DRW 7.3
2011 25 RL Wildcat
former fiver 1976 Fourwinds had for 35 years