Mattress Sizes

Most brands manufacture all of the standard mattress sizes including Twin XL, Full XL, and California King, but not every model is available in all of these sizes. The Queen size mattress is the most popular, so virtually every model is available in that size. On the other hand, the Twin XL, Full XL, and California Kind sizes are not always available for every model, and when they are, they often cost the same as the next size up (Twin XL = Full, Full XL = Queen) due to the lower demand. But with thousands of mattresses available from the major brands, you should have no trouble finding a great mattress in the size and comfort you desire. We even have a robust selection of made-to-order mattresses with custom dimensions to suit any situation.


Crib 27” x 52”
Twin 39” x 75”
Extra Long Twin 39” x 80”
Full 54” x 75”
Extra Long Full 54” x 80”
Queen 60” x 80”
King 76” x 80”
California King 72” x 84”

Please note that mattresses sizes may vary by manufacturer.


Have a tight living space such as a guest bedroom or a child’s bedroom?  A twin or “single” mattress offers a good option for these areas, along with daybeds and bunk beds.  Adult sleepers may need to opt for the twin-xl for added length.

Twin-XL Mattress Dimensions: 39” x 80”

The twin-xl gives an extra 5 inches of length for sleepers that are taller.  It’s the standard option for dorm rooms when a twin mattress is simply too short.


Best for one person, a full or “double” mattress is nice for guest rooms and growing children.  Adults can also enjoy the added space, though length may still be an issue.  Two sleepers would likely have problems on a full mattress, as there would only be 27 inches of space per person.

Full-XL Mattress Dimensions: 54” x 80”

The full-xl gives an extra 5 inches of length for sleepers that are taller.  It’s a nice option if you want to avoid upgrading to a queen mattress.


The extra space is a pleasant luxury for sleepers accustomed to a twin or full mattress.  This is the most popular mattress size, and it’s perfect for a guest room or a smaller master bedroom.  Single sleepers who like to spread out will certainly enjoy a queen mattress.


On a king or “Eastern/standard king” mattress, the 16 extra inches of length can mean a great deal to sleepers.  This is why it is the mattress size of choice for master bedrooms, as two people would each have around 38 inches of space.  Make sure that it will fit in the room before purchasing!

California King Mattress Dimensions: 72” x 84”

The California King or “Western King” adds 4 inches of legroom and takes away 4 inches of width from the king mattress.  It is the longest mattress available, except for a custom mattress, making it an ideal choice for tall sleepers!


Choosing a mattress size is vital to selecting the right bed.  Keep the following tips in mind to pinpoint the best mattress size for your next dream bed:

Size of the Sleeper(s): A slender person will need much less room than two larger adults.  For two people, divide the width by two to estimate each person’s sleep room.  Having enough space for one’s sleep style (such as if you sprawl out during the night) is critical to a good night’s sleep.

Size of the Room: It’s true – a king mattress would be nice to have.  However, there may not be enough space in the room to justify such a mattress.  Allow for space on each side to get in and out of the bed.  If you have room for 2 nightstands, you could reduce to one nightstand and have a king.  As a bonus, make sure that the mattress will fit through the door and any narrow hallways.

Budget: That king mattress will likely be more expensive than a twin or full mattress.  Make sure that you keep in mind any price differences when looking at mattress sizes.  Remember that our mattresses on sale can often level the playing field, giving you a larger mattress for less!

Split Boxes: Do you live in an older home or one that has tight stair cases/hallways?  A split box spring can be a solution, as you won’t be able to bend around corners.

Mattress Profiles: If you purchase a thick mattress, you could opt for a low profile box spring, which will reduce from 9 inches to 4.5 or 5 inches.  This can be crucial for making it easier to get in and out of bed, and especially for the elderly.

All Things Mattresses

Mattress Basics

  • Mattress Sizes
  • Types of Mattresses
  • Support vs. Comfort
  • Importance of A Pillow
  • Mattress Technologies
  • Bed Bases Explained


Mattress Shopping

  • Buying a Mattress
  • Mattress Shopping Tips
  • Common Mattress Terms
  • When to Buy a New Mattress
  • How to Choose the Right Mattress

Mattress Care

  • How to Clean and Care for Your Mattress
  • Mattress Protection
  • All About Warranty’s
  • Mattress Flipping and Rotating


Mattress FAQs

  • How long should my new mattress last?
  • What is the “breal-in” period of a mattress?
  • Does my mattress need special sheets?
  • How to I avoid body impressions?

What kind of Frame do I need for my mattress?

Sleep Smarter

Sleep Health

  • Importance of Sleep
  • Recommended Hours of Sleep
  • Common Sleep Disorders
  • Sleep Posture and Spine Health
  • Stages of Sleep


Sleep Tips

  • How to Sleep Better
  • Don’t Sleep Like A Baby
  • Good Sleep Habits
  • Sleep Myths Debunked
  • Sleep Tips for Couples

Sleep in the News

  • Sleep Tracking Devices
  • Our Society on Sleep
  • Sleep Technology
  • Sleep Studies