July 26, 2021
Filed under: Mattress Guide

Choosing the mattress size that is right for you is just as important as choosing your mattress comfort and construction.

Your current needs, living space and sleeping arrangement will play a role in whether you choose a Full over a Queen, while knowing of future plans might play a role in whether you choose a King-sized bed versus a Queen size.

No matter your situation we know that one size definitely doesn’t fit all when it comes to a bed, so consider the information below as your own personal comfort and mattress sizes guide that is here to help you find your perfect fit.

Before we get into the nitty gritty of the advantages of each individual sized mattress, here’s a US bed size chart to get your started. We broke it down by inches, square inches and even square feet so you can compare them to how much space you have.

Mattress Size Dimensions Guide

 

Bed Type Width x Length Sq. Inches Sq. Feet
Twin 38″ x 74.5″ 2,831 19.7
Twin XL 38″ x 79.5″ 3,021 21
Full 53″ x 74.5″ 3,948.5 27.4
Queen 60″ x 79.5″ 4,770 33.1
King 76″ x 79.5″ 6,042 42
Cal King 72″ x 83.5″ 6,012 41.7


 

MATTRESS SIZE GUIDE INDEX

 

TWIN MATTRESS DIMENSIONS SIZE GUIDE

Approx. Size: 38” x 74.5” / 2,831 sq in / 19.7 sq ft
Have a child who has outgrown their crib? Have kids sharing a room? Have a bunk bed frame? Have a daybed frame? Have very limited sleeping space? If your needs are similar to these questions you should consider investing in a twin sized bed.

Serta Twin Size Recommendations:

On a budget? Check out this compact mattress in a box option.
Serta EZ Tote Mattress in a Box

Looking for bunk bed or daybed mattress options? Consider this comfy mattress in a box.
Serta Perfect Sleeper Nestled Night Mattress

Looking for an adult? Consider this cooling, supportive option below.
Serta Serene Sky Bed

 

TWIN XL BED DIMENSIONS SIZE GUIDE

Approx. Size: 38” X 79.5” / 3,021 sq in / 21 sq ft

Are you a single adult living in a small space like a studio apartment? Are you a college student looking for a good night’s sleep? Need to get a bed for your child’s first dorm room? Have an extra tall kiddo? Have a split king set up that you need new mattresses for? If you said yes to any of these questions you should consider looking at a Twin XL.

Serta Twin XL Size Recommendations:

On a budget? Looking for a taller child? Looking for a dorm room? You might want to consider this extra long cradling, pressure relieving option.
Nestled Night Bed in a Box

Looking for a small studio apartment? Looking for an adult? Check out this newly designed pressure relieving option.
Serta Perfect Sleeper Bed

Looking for a split king? Check out one of these two comfortably cool options.
Serta iComfort Bed

Serta iComfort Hybrid Bed

 

FULL SIZE MATTRESS DIMENSIONS GUIDE

Approx. Size: 53” X 74.5” / 3,948.5 sq in / 27.4 sq ft

Do you have a compact living space? Are you a couple who doesn’t need a lot of space to move around at night? Do you have a child off to college that has a little larger dorm room? Do you have a young adult living at home with you? Do you have a growing child you don’t want to buy multiple beds for throughout the years? Do you have a guest room? If you were shaking your head yes to any of these questions then a full size (sometimes referred to as double size) bed is the way to go.

Serta Full Size Recommendations:

On a budget? Looking for growing child? Check out this supportive, comfortable mattress in a box option.
Serta EZ Tote Bed in a Box

Looking for a guest room? Check out this cradling, pressure relieving comfort, you or your guests are sure to love.
Serta Perfect Sleeper Nestled Night Bed in a Box

Looking for yourself? Consider this hybrid option below.
Serta iComfort Hybrid Bed

 

QUEEN SIZED BED MATTRESS SIZE GUIDE

Approx. Size: 60” X 79.5” / 4,770 sq in / 33.1 sq ft

Are you a single sleeper who likes to spread out or roll around while sleeping? Are you on a budget? Are you looking for a bed that is big enough to stretch out on but doesn’t crowd your living space? Are you a couple who likes to cuddle? Is your family growing but your space isn’t quite yet? If you answered yes to any of these questions a queen is what you should be looking at.

Serta Queen Size Recommendations:

On a budget? Check out this cooling and supportive option from Serta.com.
Serta Serene Sky Bed

Want to sleep cooler? Check out one of these two cool and cozy options below.
Serta iComfort Bed

Serta iComfort Hybrid Bed

Need some pressure relief while sleeping? Check out this newly designed pressure relieving option.
Serta Perfect Sleeper Bed

 

KING SIZED BED DIMENSIONS GUIDE

Approx. Size: Approx. 76” X 79.5” / 6,042 sq in / 42 sq ft

Do you like more room to spread out while you are sleeping? Do you love your significant other but crave your space in bed? Do you share a bed with a partner who is a hot or restless sleeper? Do you share a bed with someone on a different sleep schedule than you? Or are you a human or fur parent who sometimes shares their bed whether they really want to or not? Do you have a shorter, wider master bedroom or sleep space? If you answered yes to any of these questions and you have the extra room a king sized mattress is the way to go for you.

Serta King Size Recommendations:

On a budget? Check out this cooling and supportive option from Serta.com.
Serta Serene Sky

Hot sleeper? Looking to sleep cooler? Check out one of these two cool and cozy options below.
Serta iComfort

Serta iComfort Hybrid

Looking for better pressure relief? Check out this newly designed option.
Serta Perfect Sleeper

 

CALIFORNIA KING BED SIZE GUIDE

Approx. Size: 72” x 83.5” / 6,012 sq in / 41.7 sq ft

Are you 6’2″ or taller? Do your feet hang off the end of your current bed? Do you have a long, narrow master bedroom/sleep space? Do you crave more leg room in the middle of the night? Do you like to sleep with a lot of pillows and find yourself towards the end of the bed at night? Do you have fur babies that like to sleep at the foot of your bed? If you nodded a yes to any of these questions and are looking for a long, narrow sleeping solution with enough room to still spread out on, a California King might be the solution you are looking for.

Serta California King Size Recommendations:

On a Budget? Check out the cooling and supportive Serene Sky mattress.
Serta Serene Sky

Want to Sleep Cooler? Choose from the iComfort or iComfort Hybrid below to sleep cool and cozy.
Serta iComfort

Serta iComfort Hybrid

Need better pressure relief? Check out the newly designed Perfect Sleeper.
Serta Perfect Sleeper

Still unsure which king size you should go with, check out this California King vs King blog post.

There is no right or wrong answer to the age old question, “What mattress size is best for me?” A mattress is an investment you won’t want to replace in a few years so make sure you take your time, write out a pros and cons list if you have to, and don’t forget to consider the future along with your current situation. Good luck! You’ve got this!

A little nervous to shop online for a mattress? We offer a 120 day in-home trial or if you would prefer we have hundreds of locations around the US where you can go try it out before you buy. Find a store near you now.

National Sleep Foundation’s logo, name, materials and/or insights used under license from NSF in exchange for Serta’s financial support of NSF’s sleep research and educational activities.

The Consumer’s Digest Best Buy seal, editorial review text, references to the editorial review, and Consumer’s Digest Best Buy rating are registered certification marks and trademarks of Consumers Digest Communications, LLC used under paid license. For award information, visit www.consumersdigest.com.