Mattress Sizes Chart and Bed Dimensions Guide

Last Updated June 11, 2024

Mattress Sizes Chart and Bed Dimensions Guide is Updated for 2024 and is an essential Reference Resource. A common problem for those with smaller bedrooms is not having enough space to fit a large bed. And even if your bedroom is on the spacious side, chances are you might still want a larger bed for added comfort. That's why it's important to know the different mattress sizes and dimensions before you go shopping.

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Key Takeaways:

  • Standard US mattress sizes include - Twin (Single), Twin XL, Full (Double), Queen, King, and California King.
  • Twin (38 x 75 inches) and Twin XL (38 x 80 inches) sizes are great choices for children, teenagers, and adult single sleepers.
  • Full (54 x 75 inches) and Queen (60 x 80 inches) sizes are popular choices for couples, with Queen being the most common mattress size in America.
  • King (76 x 80 inches) and California King (72 x 84 inches) offer expansive options for those needing extra space, ideal for taller individuals, families, and couples.
  • Other non-standard mattress sizes include - Crib (28" x 52"), Full XL (54" x 80"), Super King (72" x 78"), Texas King (80" x 98"), Alaskan King (108" x 108"), California Queen (60" x 84"), Olympic Queen (66" x 80"), and RV Sizes.
mattress sizes guide in centimeters feet inches for bed sizes comparison

This guide will give you an overview of the different mattress sizes and bed dimensions (bed widths and bed lengths) available on the market so that you can find the perfect fit for your needs.

Mattress Sizes and Dimensions Chart

It can be tricky to know whether you should get a full, queen, or king size mattress. And then there are all the different mattress dimensions to consider! To help you make sense of it all, we've put together a mattress sizes and dimensions chart.

(Width x Length)
(Width x Length)
(Width x Length)
Crib 28 x 52 inches 71.12 x 132.08 cm 2.33 x 4.33 feet
Twin 38 x 75 inches 96.52 x 190.5 cm 3.16 x 6.25 feet
Twin XL 38 x 80 inches 96.52 x 203.2 cm 3.16 x 6.66 feet
Full 54 x 75 inches 137.16 x 190.5 cm 4.5 x 6.25 feet
Full XL 54 x 80 inches 137.16 x 203.2 cm 4.5 x 6.66 feet
Queen 60 x 80 inches 152.4 x 203.2 cm 5 x 6.66 feet
California Queen 60 x 84 inches 152.4 x 213.36 cm 5 x 7 feet
Olympic Queen 66 x 80 inches 167.64 x 203.2 cm 5.5 x 6.66 feet
King 76 x 80 inches 193.04 x 203.2 cm 6.33 x 6.66 feet
California King 72 x 84 inches 182.88 x 213.36 cm 6 x 7 feet
Texas King 80 x 98 inches 203.2 x 248.92 cm 6.66 x 8.16 feetet

Before we get into the details, please note that this is not an international mattress size guide as it focuses solely on mattress sizes and dimensions in Canada and the US.

Standard Mattress Sizes

The first step to your research should be getting to know the types of mattresses that are commonly found in American bedding stores. Standard mattress sizes make it easy to find sheets and other bedding that will fit your bed, and they also make it easier to move your mattress from one place to another.

Below, we have listed the most popular mattresses here (along with dimensions, recommended room size, and bed frame sizes); by the time you complete this list, you will have a better idea of your style preferences.

Twin Mattress Size

  • Twin bed size dimensions: 38 x 75 inches
  • Minimum recommended room size: 7 x 10 feet
  • Bed frame size: 40–43 x 77–80 inches
Regular twin beds sleeping space within bedroom dimensions

The twin size mattress is another name given to a single mattress, i.e., a mattress that can accommodate a single adult sleeper, though there isn’t much room to move about in sleep. It is the smallest of all the standard size mattresses in America.

A regular twin mattress is ideally preferred by parents of children when choosing a first mattress for their individual beds or bunk beds. Children and regular-sized teens can keep on using twin mattresses well into adulthood. It is also suitable for adults under 6 feet tall with a space issue.

Twin XL Mattress Size

twin XL bed mattress size chart as per most mattress manufacturers for smaller rooms

Twin XL mattresses measure 38 inches wide and 80 inches long, making them 5 inches longer than twin size mattresses. This difference in length contributes to the XL’s specific popularity in college dorms. Basically, teens who get hit by growth spurts outgrow their previous mattresses, so the next most popular choice is to go for the twin XL mattress. It can accommodate kids as tall as 6 feet 5 inches, so huge legroom is assured.

Colleges also tend to furnish all their dorm beds with twin XL mattresses to accommodate students of average to tall heights. They are typically more expensive than standard twin mattresses due to their larger mattress size. However, twin XL beds can be a great investment for those who need the extra space.

Full Mattress Size

  • Full size bed dimensions: 54 x 75 inches
  • Minimum recommended room size: 9.6 x 10. 6 feet
  • Bed frame size: 56–59 x 77–80 inches
Full size bed with extra sleeping space for solo sleepers

The full size mattress, also referred to as the double mattress, measures 54 inches wide and 75 inches long. The mattress is called full size or double because it used to be the standard sleeping mattress for couples way back in the 1940s.

The double bed fits easily in a 9 feet 6 inches by 10 feet 6 inches room; however, you have to account for furniture, other utilities and moveable space within the room. Thus, a few inches more on each side should be ideal for a room where a double mattress is to be installed.

Queen Mattress Size

  • Queen size bed dimensions: 60 x 80 inches
  • Minimum recommended room size: 10 x 10 feet
  • Bed frame size: 62–65 x 82–85 inches
Queen size bed on queen bed frames with ample room for couples

A queen mattress is a bed that is 60 inches wide and 80 inches long. This makes it slightly smaller than a king mattress, which is typically 76 inches wide and 80 inches long.

Queen mattresses are the most popular mattress size in America, as they are the ideal standard size mattress where a couple can comfortably sleep together without running into space issues. Both partners will have ample legroom to reposition once in a while in sleep without waking the other, or worse, pushing them off the bed!

Pro Tip: Opt for a split queen mattress if you and your partner have different mattress preferences.

King Mattress Size

  • King size bed dimensions: 76 x 80 inches
  • Minimum recommended room size: 12 x 12 feet
  • Bed frame size: 78–81 x 82–85 inches
King mattress size for families with different mattress preferences

A king mattress is a great choice for couples who want plenty of space to sprawl out or for anyone who simply wants more room to themselves. Its dimensions are 76 inches wide by 80 inches long, making it significantly wider than a queen mattress.

Moving the mattress can be a bit of a tough job but it's all worth it when you see the mattress tie your master bedroom together. For context, a standard king size bed is about the same size as two twin XL mattresses joined together.

Pro Tip: Go for a split king mattress if you and your partner have different mattress preferences.

California King Mattress Size

California king bed size for tall sleepers and families

A California King mattress is one of the biggest mattress size options available. It is 72 inches wide and 84 inches long, making it 4 inches narrower but 4 inches longer than a standard king mattress. This extra length can be a big advantage for people who are 6 feet tall or taller, as it gives them more room to stretch out.

Non-Standard Mattress Sizes

In addition to the above, there are also other non-standard mattress sizes available. This includes:

Crib Mattress Size

crib mattress dimension size convert cm equal meters

A crib size mattress fits inside a crib, and its dimensions are regulated by the government (to be at least 27 1/4 inches wide and 51 5/8 inches long) in adherence to safety hazards. Commercially, a crib mattress is typically 28 x 52 inches. This size is also known as a mini or junior bed. Some crib mattresses have one extra inch in length, which is helpful if you plan on using the mattress for a toddler bed.

Crib mattresses have to be at least 6 inches thick and firm. A child is safe inside the crib at a height of 3 feet. Once the child outgrows the height, it's time to shift to a small single mattress.

Full-XL Mattress Size

Full XL Mattress Size

The Full XL mattress is a larger version of the double mattress and measures 54 x 80 inches. While this mattress may not be ideal for accommodating two fully grown adults comfortably, individuals taller than the average American (69 inches) will likely find it more suitable for their height.

Olympic Queen Mattress Size

Olympic queen mattress

Olympic queen size mattresses are a great option for couples who want more space than a standard queen mattress offers. With dimensions of 66" x 80", an Olympic queen is 6" wider than a standard queen. You know what it means—your precious sleep just got a little more comfortable. This extra width can make a big difference when you're trying to share a bed with another person or a pet.

California Queen Mattress Size

California Queen Mattress with bedroom size 10 x 12 feet

The California queen mattress is a variation of the California king mattress and measures 60 inches wide and 84 inches long, making it 4 inches longer than a standard queen size mattress. For couples with very tall sleepers, it's the perfect choice.

Super-King Mattress Size

super king mattress size and dimensions in king bed measurements

A super king mattress is one of the largest on the market, measuring in at a whopping 72 inches wide by 78 inches long. That's nearly six feet wide and seven feet long! It's the perfect size for a spacious master bedroom or for anyone who just likes to have a lot of room to sprawl out. If you're considering a super king mattress, you'll need to make sure you have enough space in your room for it.

Texas Mattress Size

Texas Mattress appropriate mattress size

The Texas King bed dimensions are pretty impressive, measuring 80 inches by 98 inches. It is named after the State of Texas, which is known for its large size. Texas mattresses are also sometimes called "family size" mattresses because they can comfortably sleep three or four people.

While most mattresses come in standard sizes, Texas mattresses are not as common and may be harder to find. However, they can be worth the effort if you need the extra space.

Alaskan King Mattress Size

Alaskan king mattress size and dimensions calculator with ample space

When it comes to luxurious and spacious sleeping arrangements, the Alaskan king bed dimensions take center stage in the realm of expansive mattresses. It is one of the largest mattresses available on the market, measuring 108 inches wide by 108 inches long. That means that it's nearly nine feet wide and nine feet long! Just be sure that you have enough space in your bedroom to accommodate this massive piece of furniture.

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RV Mattress Size

RV mattress thickness camping size dimension with short queen bed measurement

RVs can come equipped with various bed sizes, including full size (54" x 75"), queen size (60" x 80"), king size (76" x 80"), and California king (72" x 84"). Additionally, RVs may often use non-standard sizes like RV Short Queen (60" x 75"), RV Short King (72" x 75"), Full XL (54" x 80"), and RV Bunk (28" x 75") with custom bedding to fit limited spaces.

RV mattress thickness typically ranges from four to eight inches, with low-profile options available for restricted headroom.

How to choose the right mattress size based on your needs?

When it comes to choosing a mattress, size is an important consideration. After all, you want to make sure you have enough room to comfortably sleep, and you don't want your mattress to be so large that it takes up too much space in your bedroom. But how do you know what size mattress is right for you?

Here are a few things to keep in mind when choosing a mattress size:

Bedroom Size

mattress size selection based on walking space and same length room size with bedroom furniture

For a mattress to fit ideally into a room, its inclusion should not hinder the moveable space and should not make the furniture and other assortments look like they are cramping the spatial freedom of the room. In a nutshell, a new mattress should not make you feel like the room is visually stressful; you don’t want that in a bedroom.

If you have a small bedroom, for instance, it might be best to choose a twin mattress or a full size mattress. If you have a large bedroom, you might want to consider upgrading to a queen or king size mattress.

Sleeping Partner

In many cases, the need to buy a new mattress comes up when a single one just won’t do. Either you have started a new relationship, or your partner is moving in, or maybe you got married recently. All these factors are reason enough to get an upgrade.

For your convenience, here’s a list of Single-Sleeper Mattresses, i.e., only one person can sleep comfortably:

  • Twin mattress (38" x 75")
  • Twin XL mattress (38" x 80")
  • Small Single mattress (30" x 75")
  • Full (Double) mattress (54" x 75")
  • Full XL mattress (54" x 80")

Here’s a list of Double-Sleeper Mattresses, i.e., two people can sleep comfortably:

  • Queen mattress (60" x 80")
  • Olympic Queen mattress (66" x 80")

And here's a list of Double-Sleeper Mattresses that can accommodate adults, children, and pets comfortably:

  • King mattress (76" x 80")
  • California King mattress (72" x 84")

The Queen and Olympic Queen can also accommodate pets and children but in doing so, the available space will get crammed.

Bedroom Position

Bedroom Position width x length as per certified sleep science coach

The heavier options, like Queen, King, and California King beds, are difficult to transport. And mattresses don’t do well if they are damaged during transit; in fact, damage can greatly reduce the effectiveness of a mattress. Therefore, it's an important factor to consider whether you live on the ground floor, a storey above ground, or in a high rise.

Whatever your situation is, make sure that you make arrangements to get the mattress delivered and installed in tip-top condition.

Your Height

If you are too short for a mattress, you may find yourself hanging off the edge. On the other hand, if you are too tall for a mattress, your feet may hang over the edge, or you may have difficulty finding sheets that fit properly. So, your height is also another important factor to consider when choosing the right mattress size.

The best mattress size for taller people is usually a queen or king size, while the best mattress size for shorter people is usually a twin or full size.

Mattress Type

Do you have any medical ailments that can benefit from a change of mattress? Time and again, doctors and chiropractors have prescribed the use of a mattress that suits your body weight and the ailment in question. So you need to know precisely whether your body needs a feather-soft mattress that makes a dent as soon as your body touches it or a strong and firm mattress that will relieve aching back pain.

Mattress allergies are also more common than you think. Do yourself a favor, get tested for allergies before buying and definitely know the full constituents of the mattress from the salesperson.


Budget for all foam, hybrid mattress, and for sleeping position when choosing the perfect mattress size

Budget is a key factor when choosing a mattress, but that doesn't mean you need to spend a fortune. Mattresses vary widely in price, from $200 to $800 for a twin bed, depending on materials and brand. Larger mattresses typically cost more, so opting for a smaller size can save money but might compromise comfort and support.

We recommend considering a long-term investment—choose a mattress that will last 10 years and support your health. Don't sacrifice sleep quality for savings; a high-quality mattress is worth the investment.


So there you have it: our comprehensive guide to mattress sizes and dimensions. Buying a new bed should not be a casual affair because sleep surely isn’t a casual thing. It's as important to research well before buying a mattress as you are informed about the food you eat. Knowing the size of your room and your bed are good places to start when you are thinking about getting a new mattress. There on, think about if you have any medical ailments or allergies, who else will be sleeping with you, material with which the mattress is made, and your budget. Now that you have all these data points, you can make an informed purchase and not regret the decision later on!

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1. How is mattress size measured?

Mattress size is measured by its width and length in inches. For example, a standard twin mattress is 38 inches wide and 75 inches long. Different sizes, like twin XL, full, queen, king, and Cal king, offer varying dimensions to suit your needs. 

If you're in the market for a new mattress, considering how to measure a mattress is crucial. Knowing these measurements helps you pick the right mattress for your space and comfort. It also ensures your mattress fits properly with your bed frame, pillows, sheets, blankets, and other bedding.

2. What sizes do mattresses come in?

The different sizes of beds and mattresses that are common all across the country include:

—> Twin size mattress (Single mattress) = 38" x 75"

—> Twin XL size mattress = 38" x 80"

—> Full size mattress (Double mattress) = 54" x 75"

—> Queen size mattress = 60" x 80"

—> King size mattress = 76" x 80"

—> California king size mattress = 72" x 84"

3. What is the best mattress for single sleepers?

Traditionally, the twin mattress was the best mattress for single sleepers. People who are taller than 6 feet will benefit from the twin XL mattress since the twin cannot accommodate tall people. If you are not bothered by budget and space and your top concern is getting a luxury sleep, then invest in a full or queen size mattress.

4. What's the best mattress size for couples?

The best mattress for couples in the United States is a queen, which measures 60 inches by 80 inches. It is versatile and comfortable; whether you are a bachelor or a family person, a queen mattress in your master bedroom will make sleep look even more inviting.

5. What is the best size of mattress for families?

The King and California King mattresses, which are sized at 76 x 80 inches and 72 x 84 inches, respectively, are the best mattresses for small families to sleep comfortably together. For bigger families, the Texas King, Alaskan King, or Family XL oversized mattresses are additional options to choose from.

6. Which is the best mattress size for guest rooms?

Queen size mattresses are usually a good choice for guest rooms because they can accommodate couples or single guests comfortably without taking up too much space. But if your guest room is smaller or if you frequently host single guests, a full size or even a twin size mattress might be more appropriate.

7. What's the largest mattress size?

The answer is an Alaskan king, which measures 108 inches wide and 108 inches long. These massive mattresses are designed for people who need a lot of space to sleep comfortably.

8. What size do two side-by-side twin XL mattresses make?

Two side-by-side twin XL mattresses make a standard king size bed. A king size bed is about 76 inches wide and 80 inches long, and two twin XL mattresses are each about 38 inches wide and 80 inches long.

Related blog posts:

1. Best Mattress For Side Sleepers

Best Mattress For Side Sleepers

2. How to Measure a Mattress the Right Way?

How to Measure a Mattress the Right Way?

3. Mattress For Kids

Best Mattress For Kids 2022

4. Mattress Topper For Back Sleepers

Best Mattress Topper For Back Sleepers 2022

5. The Importance Of Bed Frames: Why Support and Stability Matter

The Importance Of Bed Frames: Why Support and Stability Matter

Disclaimer: What is said in this article has been referenced from multiple sources and is intended only for educational and informational purposes. Please note that no content in this article is a substitute for professional advice from a qualified doctor or healthcare provider. Always consult an experienced doctor with any concerns you may have regarding a health condition or treatment, and never disregard any medical suggestions or delay in seeking treatment because of something you read here.

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