25' - rear bedroom, side bath, front lounge. Pretty much perfect for the two of us. We travel up and down the east coast, longest time out with the camper was 3 1/2 weeks (we are still working). We travel with our beloved cat Buddy, who is nearly as large as Yuki's Golden (not really, well - maybe).
Some white box owners ask us how we live without slides. I wonder why slides are so important. They ask "what about storage" and I wonder why they need to carry so much stuff. Airstreams provide us with a different style of travel, one that I really appreciate and enjoy.