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The twin mattress size is the smallest possible mattress size, other than a crib-sized mattress. Twin mattress dimensions are approximately 38 inches wide by 75 inches long. Both twin and full sizes are approximately 75 inches long, which may be too short for some adults, especially men.

Twin Mattress Size
Full Mattress Size

Sometimes still called  a double mattress, the full mattress size is 53 inches wide, which is just 15 inches wider than a twin size (single). That leaves each partner only 27 inches of personal space, or about the width of a crib. Both twin and full sizes are approximately 75 inches long, which may be too short for some adults, especially men.


Recommendations: The full mattress size bed is only enough space for a single sleeper and only if the person is under 5 feet 5 inches tall. Parents are increasingly choosing full size over twin for teenage bedrooms. Parents are even making this choice for younger children in to give themselves a more comfortable place to rest when reading together at tuck-in time.

Queen Mattress Size

Queen mattress size dimensions are 60 inches wide by approximately 80 inches long – 6 inches wider and 5 inches longer than a full mattress size. These added inches can make all the difference in comfort, especially for couples, and have made the queen size mattress today's most popular mattress size. However, with 30 inches of personal space, each adult still has 9 inches less width than if they slept alone in a twin bed. Recommendations: Queen size 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 sleeper.

King Mattress Size
Mattress Size

The king mattress size dimensions are 76 inches wide by approximately 80 inches long – about 18 inches wider than a queen. This is the closest a couple can come to having as much personal space (38 inches) as each would have on a twin bed. In fact, two twin extra-long beds pushed together are about the same size, an option that can offer a flexible arrangement for a guest room. Recommendations: A king size mattress is the best choice for couples that want maximum personal sleeping space. It's also the best bet to accommodate that time on Sunday morning when children may pop into bed – or if the pets in your house have mattress privileges! However, size can be a problem. Even with a "split boxspring" – 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. It's a good idea to break out the tape measure to check your room dimensions if there is any doubt.

Mattress Size

Buying the right size mattress can make a big difference in comfort. Consider what you are sleeping on now, could you use more room?​

Before you shop for a new mattress set, take note of the size and height of your current mattress.​ Today's mattresses are thicker than older mattresses. Take note of any furniture in your room. Do you have space for a larger mattress. Also consider your hallway and stairs, does your staircase or hallway have any tight turns? If so you will need a split foundation for your new mattress. Instead of a single piece foundation, a split foundation comes in two pieces, making it easer to go up small staircases or around tight turns. Mattress Savers will be happy to answer any and all your question.

Before you shop for a mattress, take note your room,  mattress size and height.
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