The size of your next mattress is an important consideration. It will affect your sleep-comfort, the feel of your sleep space – it might not even fit through your bedroom door! Know what sizes you have to choose from.

California King 72" x 84" King 76" x 80" Queen 60" x 80" Full ("double") 53" x 75" Twin 38" x 75" (All dimensions may vary by +/- one half inch)

Full (or Double) Full beds, sometimes called "double," are 53 inches wide. A “Full size” mattress is only enough space for a single sleeper and only if that sleeper is less than 5 feet 5 inches tall. Parents might consider a full bed for their teenage children.

Queen Queen beds are 60 inches wide by approximately 80 inches long and are the country’s most popular mattress size. A “Queen” is a good choice for guest rooms, smaller master bedrooms and for couples who prefer close quarters. It's also a great choice for single sleepers who like to spread out while they sleep.

King King beds are 76 inches wide by approximately 80 inches long. A “King” is the best choice for couples that want maximum personal sleeping space. Size can be a problem. Even with a "split box spring" – two twin-size foundations to support it – to make a king set more manageable, it may be too big for some bedrooms or too bulky to navigate through some corridors, doors and stairwells.