What Mattress Size Do I Need?

What Mattress Size Do I Need?

Does Mattress Size Really Matter?

No matter how much homework you do to select the best mattress type and comfort level, if a mattress is not the right size, it will affect your quality of sleep.

A mattress needs to accommodate all potential sleepers — kids, pets, you — while allowing you space to move around your bed comfortably.

The Most Common Mattress Sizes

Mattress Sizes by The Beloit Mattress Company

Below are some useful tips that can be helpful in guiding you towards a mattress size that is right for you.

California King: 71.5” (W) x 83.5” (L)

The “California King Mattress” is approximately 71.5 inches wide by 83.5 inches long – 4 inches narrower and 4 inches longer than a regular king.

King:  75.5” (W) x 79.5” (L)

The king-size mattress dimensions are about 18 inches wider than a queen. A king-size mattress is the best choice for couples that want maximum personal sleeping space (38 inches each would have on a twin bed; two twin extra-long beds pushed together are about the same size). 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), it may be too big for some bedrooms or too bulky to navigate through some corridors, doors, and stairwells.

Queen: 59.5” (W) x 79.5” (L)

Queen mattress dimensions are 6 inches wider and 5 inches longer than a full-size mattress. 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. 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 sleepers who are also “sprawlers”.

Full: 53.5” (W) x 74.5” (L)

A full-size mattress is 53.5 inches wide, which is just 15 inches wider than a twin size (single). That leaves each partner only 27 inches of personal space. Also at approximately 75 inches long, this size may be too short for some adults.

A full-size bed is best 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 to give themselves a more comfortable place to rest when reading together at tuck-in time.

Twin: 38.5” (W) x 79.5” (L)

A twin mattress is the smallest possible mattress size, other than a crib-sized mattress. Both twin and full sizes are approximately 75 inches long, which may be too short for some adults.

Twin XL: 38.5” (W) x 74.5” (L)

A twin XL might be a good alternative for those living in tight spaces. The XL offers several inches in length but remains around 38.5 inches in width. The XL twin is a popular choice in college dormitories.  The Twin XL is also used to make up a California King when you want adjustable bases!

How long of a mattress do you need?

Ideally, your mattress should be 6 inches longer than the tallest person sleeping in it.

Partners should be able to rest both hands behind their head (elbows sprawled) without bumping into each other.

Your mattress must fit through any doorways, corridors, and stairwells leading to your bedroom.

Determine how many people (and pets!) will be in the bed and how much room they will need. If you are the bed-time reader with your children, a full-size mattress may be more comfortable than squeezing onto a twin bed.


Looking for a mattress deal?

Did you know we’re a direct-to-consumer manufacturer?  In fact, every mattress is made by hand, one at a time, out of our Beloit WI factory.  So cutting out the middle man truly gives you the best in value, comfort, and quality.  However, for a limited time, check out our mattress deals to save even more!




Need More Help?  We Got Your Back!

Every body is unique which is why we created our Mattress Match system to help you determine which mattress would best fit your specific body needs best.  It’s super easy to use and takes but seconds to find the best mattress.




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Just researching right now?  

Check out our newest Mattress Buying Guide and How to Experience The Best Sleep Guide. Both are free! 


Mattress Buying Guide  How to Experience the Best Sleep Guide

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