@Laura2592 I guess I've been out of the States for a long time, because it really does my head in seeing the extreme and bizarre contortions that Americans (and to some extent the British) go through to avoid simply using the simple, easy, universal metric system.
Americans had a revolution, only to turn around and find bizarre ways of appropriating monarchic terms in measurements of everyday objects, when a number will do. I mean really, what do you want to know about a bed - whether it fits the dimensions of your body, or where your access to it places you in a non-existent royal lineage? (Oh, if I can get this mattress through my doorway I must be the King Of California. Right.)
When the DMV asks for your height, you don't say "Queen." (Unless maybe you're a character in "Pose.") You give them a measurement that is the distance from your head to your feet. Your height when you're standing, your length when you're unconscious. And you probably have a pretty good idea of your width too, as well as that of your partner(s), and how much extra space you need to accommodate your bedtime routines. You do 5 seconds of arithmetic and there you go, a number of centimeters that suits your needs. A simple, elegant, indisputable number.
This can not possibly be improved upon by referring to your mattress as an inbred monarch.
So here's a suggestion for American hosts: get ahead of the curve, join the rest of the world and the 21st century (which, let's admit, is not shaping up to be an American one) and just describe your beds by their numeric dimensions. In the metric system, too - inches are only for porn titles. And take all this Queen and King garbage and throw it in the dustbin of embarrassments from our persistent past, like Swimsuit Competitions and Jell-O and racism.