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Mattress Size Chart

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Mattress Size Chart & Bed Dimensions Guide

Research what mattress sizes might work best for you and your bedroom space using this mattress size diagram.

mattress size dimension guide

TypeSize Suitable for
Crib28″x52″Babies & Toddlers
Twin38″x74″Children who are coming out or a crib or toddler bed. This option is great for kids or adults who are working with limited space. *This is the standard size fro loft or bunk beds.
Twin XL38″x80″This size is great for kids or adults who are tall. This size is also typical for dorm room bunk beds. *Also common is using two twin XL’s to create a split king, most commonly uses for split king adjustable bases.
Full or Double54″x75″This size is very common for older kids seeking more space or shorter adults with limited space.
Full XL54″x80″This option is typical for adults who are limited in space but still want the same length as a queen size mattress.
Queen60″x80″Queen bed size is one of the most commonly purchases for adults and couples that do not require a lot of sleeping space or have a smaller bedroom.
King 76″x80″This is the most common size for couples who want to maximize their sleeping space. This option is great for couples who have the space or have children and pets who like to snuggle with mom and dad.
Cal-King72″x84″This is a very common size in California. This option is best for couples who prefer the extra sleeping space and for taller individuals. Sometimes a narrow and long room will accomodate this size better than a regular king.
Wyoming King84″x84″This size is not common in stores or online but some brands will accomodate.
Alaskan King108″x108″This size….sounds amazing right!? Alaska king is also not common and would most likely incur a hefty upcharge to have made.

crib mattress

Crib

This size is made specifically for cribs.  Many cribs adjust into toddler beds as the child gets older as well.  This size mattress is typically 28″x52″.  Bear in mind if you measure most mattresses they can appear off by about an inch or so in one direction or the other.

twin mattress size

Twin

This size mattress is 38″x75″.

The Twin Mattress size is the quintessential mattress for kids that outgrew their crib or toddler bed.

This is also the most common size for as bunk beds & day beds.  This size is also ideal for shorter stature adults who have limited space.

*Bear in mind if you measure most mattresses they can appear off by about an inch or so in one direction or the other.

twin XL mattress size

Twin XL (Xtra Long)

This size mattress is 38″x 80″.

The Twin XL Size Mattress is the best mattress for kids that outgrew their crib or toddler bed who are tall and have limited room space.  Also a great choice for adults who have limited space and require more length than a regular twin for leg room.

There are many types of bed sizes but this one is the most common bed sizes for dorm room bunk beds and lofts.

*Bear in mind if you measure most mattresses they can appear off by about an inch or so in one direction or the other.

full/double mattress size

Full/Double

This size mattress is 54″x 75″.

The Full size is commonly knows as a double or “standard” size.  This is a great size for kids seeking a larger mattress.

Also a great choice for adults who have limited space but want more width than a twin provides.

Although two people can sleep on a full bed size, it is not ideal.  If you have a partner, child or pet that sleeps with you, if you can fit a queen, we would suggest upgrading.

*Bear in mind if you measure most mattresses they can appear off by about an inch or so in one direction or the other.

full/dobule XL mattress size

Full/Double XL

This size mattress is 54″x 80″.

The Full XL size is suited for singles who want more space and may not have the space for a queen.  You will get the same length as a queen for added leg room.

Also a great choice for adults who have limited space but want more width than a twin but the length of a queen.

Although two people can sleep on a full, it is not ideal.  If you have a partner, child or pet that sleeps with you, if you can fit a queen, we would suggest upgrading.

*Bear in mind if you measure most mattresses they can appear off by about an inch or so in one direction or the other.

queen mattress size

Queen

This size mattress is 60″x 80″.

Perhaps the most commonly sold mattress in the world, the queen size is ideal for couples or singles with kids/pets who sleep with you.

If you are considering anything larger than a Queen you will want to make sure to measure your living space first.

The next thing to consider is if you sleep set has to go up or down a staircase.  Many old homes in a city have smaller stairwells.  If your home fits in this category, have no fear, you can order a split boxspring/foundation.  The mattress is not an issue since they will bend if needed in most cases.

*Bear in mind if you measure most mattresses they can appear off by about an inch or so in one direction or the other.

king mattress size

King/Eastern King

How big is a king bed? This size mattress is 76″x 80″.

King size mattresses are preferred by most couples.  You will just want to make sure your room can accommodate this size before purchasing.  A regular king is the most commonly bought eastern king bed size because the length is sufficient for most adults and most couples want the extra width vs length. 

King boxsprings/foundations are split, so most stairwells will not be an issue.

*Bear in mind if you measure most mattresses they can appear off by about an inch or so in one direction or the other.

*Also there are different king bed sizes so you should be aware of this

california king mattress size

Cal-King

This size mattress is 72″x 84″.

Cal-King size mattresses are preferred by couples or couples or coupes who have a tall sleeper or a bed bigger than king.  You will just want to make sure your room can accommodate this size before purchasing.  With less width and more length this size is ideal for tall people or people who have a narrow but long room.

King boxsprings/foundations are split, so most stairwells will not be an issue.

*Bear in mind if you measure most mattresses they can appear off by about an inch or so in one direction or the other.

Wyoming King

This size mattress is 84″x 84″.

Wyoming king bed size mattresses are ideal for people seeking a lot of space and something bigger then cal king.  These mattresses are not commonly made from most manufacturers.  Some factories will custom make this size for you but there will most likely be an upcharge.  Finding sheets and bedding sets to fit could be a challenge as well.

*Bear in mind if you measure most mattresses they can appear off by about an inch or so in one direction or the other.

alaskan kind mattress

Alaskan King Mattress

The Alaskan King Mattress sizes are 108″x 108″.

Alaskan king size bed mattresses are ideal for the whole family.  These mattresses are not commonly made from most manufacturers.  Some factories will custom make this alaska king mattress size for you but there will most likely be an upcharge.  Finding sheets and bedding sets for an alaska king bed to fit could be a challenge as well. Thats why they also sell alaskan king bed sheets that fit well.

*Bear in mind if you measure most alaska king size mattresses they can appear off by about an inch or so in one direction or the other. Many people dont know how big is an alaskan king bed so you should always research first

Answers to Common Questions About Mattress Sizes

How do you determine mattress size?

There are standard mattress sizes in the USA and most parts of the world. Standard sizes include twin 38 inches x 75 inches, twin xl 38×80, Full 54×75, Queen 60×80, King 76×80, and California king 72×84. There are also some common custom sizes such as short queens at 60×75 or long fulls at 54×80. You can also read our mattress reviews to gain insights.

What size is best for a mattress?

What size mattress is best for you is based on individual needs. Children often sleep on twin, twin xl, or full-size mattresses, such as a SleepOvation mattress. Most adults, if room permits often choose queen or king-size mattresses. Couples should be considering a queen at least but ideally, if your bedroom has the space king size is the best option for two people.

Are mattress sizes universal?

Mattress sizes are universal within the USA and some parts of the world. However, in some countries mattress sizes and names can differ and they have their own universal sizes and names. The best mattresses typically come in multiple sizes which are clearly stated.

What sizes do RV mattresses come in?

Many RV mattresses will fit standard mattress sizes. A very common RV mattress size is what is called a short queen. They are often 5 inches shorter than a regular queen. Some RV’s and campers will have custom-size mattresses, when replacing this type of mattress there are a number of brands or factories around the country that can make completely custom-size mattresses. There is typically an upcharge for such a mattress to be made. Testing a mattress in advance of making a purchase is always adviced. However, this is more challenging on custom orders.

How do I know what size mattress I have?

The best way to figure out the size of your mattress is to measure it from side to side.  A twin and twin xl will measure the same from side to side at 38 inches. Measuring from head to toe may be needed to narrow down if you have a regular or twin xl. A twin will measure 75 inches long and an XL will measure 80 inches long.

For the rest of the sizes you can measure side to side. A full will measure 54 inches wide, a queen 60 inches wide, a king 76 inches wide, and a California king 72 inches wide. Keep in mind most manufacturers will allow a variance of around 1 inch. When you measure, they may not always be the exact measurement.

What are the 5 types of beds according to their sizes?

The main mattress types according to size are:

  • Twin (sometimes called a single).
  • Twin XL.
  • Full (sometimes called a double).
  • Queen.
  • King.
  • California King

Listed above are the standard mattress sizes in the United States. You will also benefit from reading our Full vs Queen size mattress guide and Twin vs Twin XL mattress guide.

Conclusion: Finding the best mattress size for you

When trying to find the right mattress size to fit the needs of you or your family, these are a few things to have in mind.

  • If upgrading for adults to a larger size be sure to measure your room to make sure you can accommodate the size you want.
  • If you are upgrading your child’s mattress be mindful of how tall they may get and if you want to bypass a twin size for a full or queen if height is prominent in your family.
  • Third, who will be sleeping in it? If it’s just you and you are not tall, you may be good with a twin xl r full/double size.  But, if you are a couple, single with a child or pet you may want to strongly consider a queen or king.
  • Keep in mind if you are looking to buy a new bedroom set or upgrade in mattress size, the larger you go typically the bed frame, beds, platforms, etc will also become more expensive to buy.  Spending more now to get the comfort and space you want is generally not a bad investment.  Unless it doesn’t fit in your space, you will never say “I wish I had a smaller mattress”.

Now that you have an idea of what size mattress could work great for you take some time to see our other guides and which mattress might work best for you.

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