A queen box spring mattress is 60 inches wide and 80 inches long. Queen mattresses are the most popular mattress size and are ideal for accommodating two adults.
Queen-size mattresses are often used in master bedrooms that are not large enough to fit a king-size bed, but they are also commonly used in guest rooms. Single sleepers who like to spread out also sometimes opt for queen-size beds.
Full-size mattresses and king-size mattresses also accommodate two adults. At 54 inches wide and 75 inches long, a full-size mattress can accommodate two people, but it is sometimes a tight fit and may be too short for some adults. It is often used for a single person. A king-size mattress is 76 inches wide and 80 inches long, providing space for two people to sleep comfortably.