This may, or may not be of any use. Our trailer apparently originally came with something call and Olympic Queen, but it appears that's no longer readily available. From what I understand, it was the same length as a regular queen, but wider. Anyway, the previous owner shoe-horned TWO king sized mattresses into that space; one on top of the other. (Yeah, I don't know, either!) It was impossible for us to maneuver around the bedroom with that configuration, so we immediately removed both king mattresses (they burned rally well) and replaced them with a good quality regular queen mattress. I did have to trim a couple inches off each side of the platform but that was pretty easy. Hope this helps.