(used especially of beds) not as large as king-size(adjective)
WordNet. Princeton University. 2010.
Use "queen-sized" in a sentence
"I am not that comfortable in bed these days, and at least I have a queen-sized to myself."
"She crashed into a concrete buttress on the 35, trying to avoid a queen-sized Beautyrest mattress that broke free from loose bindings atop a pick-up truck."
"It IS possible to get 4 people on a queen-sized air mattress, but none of you are going to actually sleep."