If needed, custom twin mattresses can be made much longer (perhaps 8" on the 25FB as the Classic twins can be over 10" longer). Also 10" thick will work with the night stand.
We went with the Rocky Mountain 8" twins on the 2014 Classic as I lacked the height measurement at the time. This year we may order 10" thick and about 8" longer. We went with the 10" Rocky Mountain in the 23D and that is really great!
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels