Skip to main content
  • Canadian FlagShop Casper Mattresses in CanadaCanada (English)
  • Canadian FlagShop Casper Mattresses in CanadaCanada (Français)
  • German FlagShop Casper Mattresses in GermanyDeutschland
  • French FlagShop Casper Mattresses in FranceFrance
  • Austrian FlagShop Casper Mattresses in AustriaÖsterreich
  • Swiss FlagShop Casper Mattresses in SwitzerlandSchweiz
  • Swiss FlagShop Casper Mattresses in SwitzerlandSuisse (Français)
  • UK FlagShop Casper Mattresses in the United KingdomUnited Kingdom
  • US FlagShop Casper Mattresses in the United StatesUnited States
Reviews
Refer & Earn
Phone+1 888.498.0003
Account
CasperCasper Logo
Mattresses
  • Mattresses
  • The Wave
    NEW
  • The Casper
  • The Essential
  • See all mattresses
Original favorite
Most Popular
The Casper Mattress
The Casper MattressAward-winning comfort, with our signature "just right" feel.Starting at $595
Pillows
  • Pillows
  • Original Casper Pillow
  • Foam Pillow
    NEW
  • Down Pillow
  • See all pillows
Rest your weary head
Foam Pillow for contouring support
Foam Pillow for contouring support
NEW
Starting at $89
Bed Frames
  • Bed Frames
  • Adjustable Bed Frames
  • Platform Bed
  • Upholstered Bed Frame
    NEW
  • Foundation + Metal Bed Frame
  • See all bed frames
An inviting bedroom look
Upholstered Bed Frame for cozy style
Upholstered Bed Frame for cozy style
NEW
Starting at $495
Bedding
  • Bedding
  • Sheets
  • Quilts
  • Duvets
  • Weighted Blanket
    NEW
  • Mattress Protector
  • See all bedding
50% off Cool Supima and Weightless Cotton
SALE
The softest sheets at a crazy good price
The softest sheets at a crazy good priceSets from $38
Glow Light
Gift Shop
  • Gifts
  • Glow Light
  • Weighted Blanket
  • Dog Bed
  • Pillows
  • Sheets
  • Down Duvet
  • See all gifts
  • Nap Pillow
  • Mattress Topper
  • Nightstand
The best gifts for better sleep
Give them a gift they’ll actually snooze.
Give them a gift they’ll actually snooze.Starting at $35
Stores BuildingStoresStores
  • Visit us
  • Find a store
  • In-store only products
  • Find a Casper store
Visit a Casper sleep shop
Your one-stop shop for all things sleep
Your one-stop shop for all things sleepChat with a Sleep Specialist, try the products in a private space, and leave with the the bed of your dreams!
  • Mattresses
    Plus IconPlus IconMinus IconMinus Icon
    • The Wave
      NEW
    • The Casper
    • The Essential
    • See all mattresses
  • Pillows
    Plus IconPlus IconMinus IconMinus Icon
    • Original Casper Pillow
    • Foam Pillow
      NEW
    • Down Pillow
    • See all pillows
  • Bed Frames
    Plus IconPlus IconMinus IconMinus Icon
    • Adjustable Bed Frames
    • Platform Bed
    • Upholstered Bed Frame
      NEW
    • Foundation + Metal Bed Frame
    • See all bed frames
  • Bedding
    Plus IconPlus IconMinus IconMinus Icon
    • Sheets
    • Quilts
    • Duvets
    • Weighted Blanket
      NEW
    • Mattress Protector
    • See all bedding
  • Glow Light
  • Gift Shop
    Plus IconPlus IconMinus IconMinus Icon
    • Glow Light
    • Weighted Blanket
    • Dog Bed
    • Pillows
    • Sheets
    • Down Duvet
    • Nap Pillow
    • Mattress Topper
    • Nightstand
    • See all gifts
  • Casper Stores
    Plus IconPlus IconMinus IconMinus Icon
    • Find a store
    • In-store only products
    • Find a Casper store
  • Account
  • Reviews
  • Refer & Earn
  • StoresCasper Stores
  • US FlagShop Casper Mattresses in the United States
    ArrowDown pointing arrow
  • +1 888.498.0003

Mattress Dimensions: Which Bed Size Is Right For You?

People lounging side-by-side on Casper mattresses in every size. Illustration

  • Twin: 38” x 75” | 96.5 X 190.5cm
  • Twin XL: 38” x 80” | 96.5 X 203cm
  • Full: 53” x 75” | 134.5 X 190.5cm
  • Queen: 60” x 80” | 152.5 X 203cm
  • King: 76” x 80” | 193 X 203cm
  • California King: 72” x 84” | 183 X 213cm

Beyond personal preference, there are a number of factors to consider before picking a mattress size. You’ll want to think about the size of your bedroom, who you’ll be sharing your bed with and available space.
 
In this guide, we illustrate the dimensions of all six standard mattress sizes to help you choose the best one for your needs. We also answer some commonly asked questions when it comes to bed sizes and choosing a mattress.

Twin

38” x 75”  

Best for kids, bunk beds or single sleepers.
Two children lounge and read on a twin-size bed. Illustration.A twin mattress is the smallest bed on the market at 38 inches wide and 75 inches long. Its compact footprint makes it ideal for single sleepers — either children or adults with small spaces like a studio apartment.

Twin XL

38” x 80”

Best for taller teenagers, single adults or anyone with limited space.
A teenage girl lounges in a dorm room on a Twin XL mattress. Illustration
The twin’s slightly longer cousin, the twin XL mattress, is the most popular size for college dorm rooms. It measures five inches longer than a twin, at 38 inches wide and 80 inches long. In addition to students, a twin XL mattress is a good solution for taller teenagers and individual adults with limited space. These beds can also be put together if you’re choosing a split king adjustable base for full body adjustability!

Full

53” x 75”

Best for young adults, couples who like to cuddle or guest rooms.
A man sits on a full-size Casper mattress. Illustration.
The full mattress is a good starter mattress for young adults or recent grads living on their own for the first time. Sometimes called a double, the full is 16 inches wider than a twin at 53 inches wide and 75 inches long. A full is not recommended for couples who like to share the bed with pets or their children, but is a smart choice for guest rooms.

Queen

60” x 80”

Best for couples or adults who like to sprawl out.
A couple lounge on a queen-size bed. One is knitting and the other is reading. Illustration.
The most popular mattress size on the market, the queen mattress, fits best in a master bedroom that is at least 10 x 10 square feet. At 60 inches wide and 80 inches long, the queen offers plenty of space for couples or individuals who like having extra room to move around in bed.

King

76” x 80”

Best for couples who enjoy their space or share a bed with children.
A couple lounges near a king-size mattress while playing with their baby. Illustration.
At 76 inches wide and 80 inches long, the king mattress is large enough to accommodate couples who share the bed with their children or a sizable pet (think: a Great Dane). A king mattress fits best in a spacious master bedroom, preferably at least 12 x 10 square feet.

California King

72” x 84”

Best for couples with kids or pets who want a luxurious amount of space.
A couple sits on their California King-size bed while playing with two dogs. Illustration.
The longest mattress on the market, the California king mattress is a whopping 72 inches wide and 84 inches long. Its generous length makes it ideal for taller individuals, especially people more than six feet tall. Of course, people of average height might also benefit from a California king depending on how many people and pets are sharing the bed.

Shop All Sizes

Which Bed Size Is The Best For Me?

If it’s time for a new mattress, you may be wondering which size is right for you. There are many things to consider, like who will be sleeping in the bed, how much space you will need, how much room is in your bedroom and any specific health or sleep issues you might face.
 
Buying a new mattress is not a one-size-fits-all situation, so it’s essential to evaluate your individual needs. If you have a history of back pain or sleep problems, you may want a free trial period to help you make sure you’re comfortable with your new mattress.
 
Here are some other major factors you will want to consider when choosing a mattress.
A person sits on an empty floor and thinks about different mattress sizes. Illustration.

Who Will Sleep In the Bed

Will you be sharing the bed with a partner? Do your children or dogs typically sleep with you? These are questions to ask yourself before deciding on mattress size. Typically twin, twin XL and full mattresses are meant for one person. The queen, king and California king beds are big enough for two sleepers.
 
If you are going to sleep with another person, consider how close you like to sleep and your usual sleeping positions. If you both like to stretch out when sleeping, the extra room afforded by a king or California king will be appreciated.

Your Room Size

The amount of space available to you should also be considered. A larger mattress will take up more space in your bedroom, so you will need to plan accordingly.
 
Here are the mattress sizes in square inches and square feet. Ensure there is plenty of space for the mattress in your room.
 

  • Twin: 2,925 sq. in./20.3 sq. ft.
  • Twin XL: 3,120 sq. in./21.7 sq. ft.
  • Full: 4,050 sq. in./28.1 sq. ft.
  • Queen: 4,800 sq. in./33.3 sq. ft.
  • King: 6,080 sq. in./42.2 sq. ft.
  • California King: 6,048 sq. in./42 sq. ft.

Your Body Size

You should take your height and width into consideration when choosing a mattress. A typical twin mattress is 75 inches tall, while a twin XL is 80 inches tall. If an individual is taller than six feet two inches, a twin mattress is probably not for them. Instead, it’s best to go with the XL, full, queen or king bed, all of which can accommodate someone who is up to 6 feet 7 inches.
 
Those that are taller than 7 feet should opt for a California king bed. For those who want more space on either side of their body, a full, queen or king bed will be the most comfortable.

Your Budget

The amount of money you are willing to spend on a mattress can also help you choose the right size. A king will cost more than a queen, and a queen more than a full, etc. Buying a mattress that meets both your size needs and your financial needs is key.

Now that you know all about the sizes and dimensions of different beds, you should be able to make an informed decision regarding your next mattress. Once you have your sizing figured out, consider an adjustable bed frame for the ultimate comfort or some soft, breathable bedding to outfit your new investment!

Mattress Dimensions FAQs

A single mattress and a twin mattress are one and the same — both have the dimensions of 38 inches by 75 inches. These, along with the twin XL (which is a little longer) are designed to fit one person.
 
The term “twin” came about because these mattresses were often placed two to a room, either in children’s rooms, hotels or other rooms that are meant to be shared by more than one person.

A twin, also known as a single mattress, is the smallest size available on the market today. Casper twin mattresses are 38 inches by 75 and are the perfect size for a child or short single sleeper. Single sleepers that need a longer bed can try a twin XL, which is 80 inches long.

The dimensions for a Casper double size mattress and a full-size mattress are 53 inches by 75 inches. In this case, both names represent the same kind of mattress. This bed is on the smaller side, but still able to fit two people if needed.

The full-sized bed (also known as a double) can fit two people. In fact, full mattresses were the most common size used by couples in the 1960s. They are advantageous because they are able to fit into smaller rooms. However, many adults these days prefer a larger bed.
 
The full bed is 53 inches by 75 inches, leaving only 26.5 inches across for each person’s personal sleeping area. The slightly larger queen bed offers 30 inches of space per person, while a king offers 38 inches per person. Depending on you and your bed mate’s sizes and sleeping styles, you may consider a queen or a king rather than a full.

If you’re deciding between a king or California king, it all comes down to four inches. A king mattress is actually four inches wider than a California king, while a California king is four inches longer than a king at 72 inches by 84 inches.

The king-sized bed is the widest bed that Casper sells, measuring at 76 inches by 80 inches. Those looking for a taller bed can purchase the California king, which is slightly longer and narrower, measuring 72 inches by 84 inches. Both beds should be large enough to fit two adults, although those who are taller may prefer a California king.

To determine the dimensions of a mattress, measure it from head to foot for the length and from side to side for the width. It may be helpful to measure the depth of the mattress as well, from the bottom where it rests on the box spring to the top.
 
You will want to use a tape measure and record these three dimensions, in inches, and repeat if necessary if you use a foundation. It’s important to measure your mattress and box spring before buying an encasement or bed.

  1. Casper Logo Mark
  2. >
  3. Mattress size comparison guide

Products

  • Mattresses
  • Pillow
  • Sheets
  • Adjustable Bed Frames
  • Glow Light
  • Dog Bed
  • Platform Bed
  • Weighted Blanket

Shop by Size

  • Twin
  • Twin XL
  • Full
  • Queen
  • King
  • Cal King
  • Size Guide

Support

  • Contact us
  • FAQ
  • Returns
  • Trial
  • Warranty
  • Financing

About

  • Our Story
  • Stores
  • Our Materials
  • Jobs
  • Press
  • Follow Casper

Resources

  • Black Friday Sale
  • Casper Promos
  • Refer & Earn
  • Trade & Commercial
  • Sleep Resources

Sign up for the latest snooze

Please enter a valid email address.
Thanks! You've signed up successfully.
Facebook IconCasper on FacebookTwitter IconCasper on TwitterInstagram IconCasper on InstagramPinterest IconVisit Casper on PinterestLinkedin IconCasper on LinkedinYoutube IconCasper on Youtube
+1 888.498.0003
US FlagShop Casper Mattresses in the United States
ArrowDown pointing arrow
© 2019PrivacyTermsAccessibilitySitemap

Your cart

Your cart is empty

Shop now
Whiteglove IconA hand catching some ZZZs

Fast, free shipping*

Your order will ship via UPS in 2-3 business days — for free!

Once your product ships, you’ll receive a shipping confirmation email with a tracking number.

* Free shipping excludes Alaska, Hawaii, Yukon Territory, Northwest Territory and Nunavut

The Foundation

A supportive alternative to the box spring.

Our strong and level Foundation serves the same function as a box spring, but offers better support and height for your mattress. Paired with a bed frame, will help your mattress perform at its peak for a decade or more.

  • Engineered with solid wood
  • Stands up to years of use
  • Easy to assemble
  • 30 night trial and free shipping and returns
  • 5 year limited warranty
  • Requires a bed frame, and works with most standard frames

The Adjustable

Find your perfect position.

Raise your head, feet, or both to get comfortable and rest easy.

  • Wireless remote control
  • Zero-Gravity position relieves pressure on your body
  • Anti-Snore position prevents snoring
  • Saves your favorite positions
  • Split King option to control your side of the bed
Rest assured
  • Fits most slatless frames, or can be used on its own. Does not require a box spring
  • 30 night trial, free shipping and returns
  • 20 year limited warranty

The Adjustable Pro

Indulge in extreme comfort.

Customize your setup with pressure-relieving positions, time-saving presets, a pre-sleep massage that lulls you to sleep and more.

  • Zero-Gravity position relieves pressure
  • Anti-snore position prevents snoring
  • Headrest tilt function
  • Massage feature
  • Under-bed lights
  • Wall-aligning technology
  • Wireless remote control
Rest assured
  • Free in-home setup included*
  • Fits most slatless frames, or can be used on its own. Does not require a box spring
  • 30 night trial, free shipping and returns
  • 20 year limited warranty
*Availability may vary by delivery postal code

What goes under your mattress?

To make sure you get the best sleep of your life, we offer three bed frame options to cover all your bases.

The Foundation + Metal Frame

The basics for your new mattress. Foam mattresses don't sit well on old box springs, so you'll need a foundation instead. Complete your set with a metal frame if you don't have one already. Explore

The Platform & Upholstered Bed Frame

An alternative to a foundation and metal frame. You can choose between The Platform or The Upholstered bed frame for an added touch of style.

The Adjustable & Adjustable Pro Bed Frame

Skip the foundation and platform bed frame, and opt for the most customizable sleep option. With an adjustable frame, you'll get the ultimate sleep experience. Explore

Already have a frame?

If you have a frame at home, make sure you use a firm, non-spring foundation or a bed frame with slots that are less than 4 inches apart. Any other kind of box spring or bed frame won't give your foam mattress the support it needs. We also don't recommend putting your mattress directly on the floor.

Pick your perfect feel without compromising comfort or support

SOFTER

Hybrid (foam + springs)

The spring base layer in our hybrids results in a slightly softer and more responsive feel.

FIRMER

All-foam

Our all-foam options provide contouring pressure relief with a slightly firmer feel.

Unsure if you’re all-foam or more hybrid?

FOAM (UPDATED 2019)HYBRID: FOAM + SPRING
  • Thin Checkmark (Without Circle)

    High-density memory foam

  • Thin Checkmark (Without Circle)

    Transition layers for comfort

  • Thin Checkmark (Without Circle)

    Open-cell foams sleep cool

  • Thin Checkmark (Without Circle)

    High-density memory foam

  • Thin Checkmark (Without Circle)

    Transition layers for comfort

  • Thin Checkmark (Without Circle)

    Open-cell foams sleep cool

  • Thin Checkmark (Without Circle)

    Springs provide added lift

  • Thin Checkmark (Without Circle)

    Individual coils for increased airflow

  • Thin Checkmark (Without Circle)

    Firmer perimeter for edge support

What you need to know about Hybrids

Added support

An added layer of resilient springs provides extra support for back, belly, and side sleepers of all sizes.

Extra lift and bounce

Hundreds of individual springs make Hybrids more responsive. Your body will feel elevated and afloat, rather than sinking in.

Added airflow

Each coil lets body heat circulate out to keep you cool through the night.

More durable

Say goodbye to sagging. The added layer of sturdy springs extends the lifespan of your mattress for many years to come.

What you need to know about Hybrids

Added support

An added layer of resilient springs provides extra support for back, belly, and side sleepers of all sizes.

Extra lift and bounce

Hundreds of individual springs make Hybrids more responsive. Your body will feel elevated and afloat, rather than sinking in.

Added airflow

Each coil lets body heat circulate out to keep you cool through the night.

More durable

Say goodbye to sagging. The added layer of sturdy springs extends the lifespan of your mattress for many years to come.

Upholstered Bed Frame

We’ve found your soft spot.

  • Made of sturdy wood and steel
  • Wrapped in three custom woven textiles
  • Features a 2-inch perimeter
  • Easy one-tool assembly
  • No box spring or foundation required
  • 30 night trial, free shipping and returns
  • 5 year limited warranty

Your ZIP code:

* In-home setup excludes Alaska and Hawaii