Gabe1
Ivory Tower Squabble EST 2011. WINDMILL SURVIVOR
Can't really explain it, but there's certainly enough room for 2 adults in a full or double, whatever you call it nowadays. (I never actually measured the mattress, but it might be that the sizes could slightly differ in a hotel mattress, versus a home one.)
My parents also had a full/double mattress for many years. Queens and kings became more popular down through the years, but quite a few people still use a full/double. (Neither one of us is tall either, so maybe two people who were 6 feet each, might need a queen or king mattress.)
Nope. Nope. Nope.