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Last Updated December 1, 2025
Interested in the best mattress sizes comparison guide? We've got the updated Mattress Sizes Chart and Bed Dimensions Guide for 2025. From crib, twin, twin XL, and full, to queen, king, California king, and more - we discuss every mattress size in detail, exploring their dimensions (inches, cm, feet), required room size, recommended bed frame size, and who they're most suitable for.
Key Takeaways:
This mattress dimensions guide provides an overview of all the different bed widths and bed lengths available on the market, so you can find the perfect fit for your needs.
It can be tricky to know whether you should get a full, queen, or king-size mattress. And then, of course, there are all the other unique mattress dimensions to consider! To help you make sense of it all, we've put together a mattress size chart:
| MATTRESS SIZE | DIMENSION IN INCHES (Width x Length) |
DIMENSION IN CM (Width x Length) |
DIMENSION IN FEET (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 | 3.17 x 6.25 feet |
| Twin XL | 38 x 80 inches | 96.52 x 203.2 cm | 3.17 x 6.67 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 6.67 feet |
| Queen | 60 x 80 inches | 152.4 x 203.2 cm | 5 x 6.67 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 6.67 feet |
| King | 76 x 80 inches | 193.04 x 203.2 cm | 6.33 x 6.67 feet |
| Super King | 72 x 78 inches | 182.88 x 198.12 cm | 6 x 6.5 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 | 6.67 x 8.17 feet |
| Alaskan King | 108 x 108 inches | 274.32 x 274.32 cm | 9 x 9 feet |
Before we get into the details, note that this is not an international mattress size guide, as it focuses solely on mattress sizes in Canada and the USA.
The first step in 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.
The twin-size mattress, also known as a single mattress, is 38 inches wide and 75 inches long. It is the smallest of all the standard-size mattresses in America. As the name suggests, it's a mattress meant for a single sleeper, though there isn’t much room to move about for adults.
A regular twin mattress is usually preferred by parents choosing a first mattress for their kids. Children and teens can keep on using twin mattresses well into adulthood. It is also suitable for adults under 6 feet in height, especially if they have limited bedroom space.
Twin XL mattresses measure 38 inches wide and 80 inches long, making them 5 inches longer than standard 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 a twin XL. It can accommodate kids up to 6 feet 5 inches tall, so plenty of 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 slightly more expensive than standard twin mattresses due to their larger size. However, twin XL beds can be a great investment for those who need the extra space.
The full-size mattress, also called a 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. But since then, the queen-size has taken over, offering more personal space to spread out while sleeping together.
Nowadays, a double bed is a spacious choice for solo sleepers - especially active ones who move around a lot and shift their sleeping position a bunch (i.e., combination sleepers).
A queen mattress measures 60 inches wide and 80 inches long. It's currently the most popular mattress size in America, offering a budget-friendly option for couples to sleep comfortably together without running into space issues. Both partners will have ample legroom and width to reposition themselves without waking the other, or worse, pushing them off the bed!
Pro tip: Go for a split queen mattress (two separate mattresses, each 30 x 80 inches, forming a queen-sized bed) if you and your partner have different mattress preferences.
A king mattress measures 76 inches wide and 80 inches long. Being significantly wider than a queen mattress, it's a great choice for couples who want plenty of space to sprawl out or for families who sleep together (parents, kids, pets, and all). It's the most spacious bed in its class, with nothing else matching its 76-inch width. And to accommodate something of this size, you'll ideally need a master bedroom.
Pro tip: Go for a split king mattress (two twin XL mattresses together that form a king-sized bed) if you and your partner have different mattress preferences.
A California King mattress measures 72 inches wide and 84 inches long. It's the 4 inches narrower but 4 inches longer version of the standard king mattress. The extra length of the Cal king size can be a big advantage for people 6 feet tall or taller, as it gives them more room to stretch their legs out.
But for this additional length, you have to trade off a bit of the width. So, instead of being able to comfortably accommodate a family of four, like the standard king, the Cal king can usually only accommodate a family of three. It's still great for couples, though.
Now that you're familiar with all the standard US mattress sizes, let's move on to the lesser-known, non-standard mattress sizes out there. Because who knows? Maybe they suit you more than the standard ones!
A crib-size mattress fits properly 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 bed" or "junior bed". Some crib mattresses have an extra inch in length, which is helpful if you plan to use the mattress as 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 crib, it's time to shift to a small single mattress.
A full XL mattress is the longer version of the standard full mattress, measuring 54 inches wide by 80 inches long. While this mattress size may not be ideal for accommodating two fully grown adults, individuals taller than the average American (5'9") will likely find it more suitable for their height.
Olympic queen-size mattresses are a great option for couples who want more space than a standard queen mattress offers. Measuring 66 inches wide and 80 inches long, an Olympic queen is 6 inches wider than the standard queen. This extra width can make a big difference when you're sharing the bed with another person.
The California queen mattress is a variation of the California king mattress and measures 60 inches wide by 84 inches long. It's 4 inches longer than a standard queen-size mattress. For couples with very tall sleepers, it's the perfect choice.
A super king mattress is slightly more compact than a standard king and measures 72 inches wide by 78 inches long. It's the perfect size for small families who may occasionally share the bed with pets or kids but don't need the full width of a king. Also works well for those who want a large bed while saving some floor space.
The Texas king bed dimensions measure 80 inches wide by 98 inches long. As is evident, it's 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 to 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.
The Alaskan king bed dimensions are massive, measuring 108 inches wide by 108 inches long. That means that it's nine feet wide and nine feet long! This square-shaped piece is one of the largest mattresses available on the market today. When it comes to luxurious and spacious sleeping arrangements, it often takes center stage. But be sure that you have enough space in your bedroom (at least 16 by 16 feet) to accommodate this massive piece of furniture.
RVs can come equipped with various bed sizes, including standard ones like queen and king. But a lot of RVs don't have that much bedroom space, so compact sizes are preferred instead, like RV short queen (60" x 75"), RV short king (72" x 75"), and RV bunk (28" x 75") with custom bedding to fit limited spaces. Aside from size, RV mattress thickness can also range from 4 to 8 inches, with low-profile options available for limited headroom.
When choosing a mattress, size is definitely 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:
For a mattress to fit properly in a room, check how much space is left once it's in there. One - it shouldn't eat up all the walking space. Two - it shouldn't make the room feel cramped when you add furniture. 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, say, less than 10 by 10 feet, it might be best to choose a twin or full-size mattress. If you have a large bedroom (more than 10 by 10 feet), you might want to consider upgrading to a queen or king-size mattress.
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:
Here’s a list of Double-Sleeper Mattresses, i.e., two people can sleep comfortably:
And here's a list of Double-Sleeper Mattresses that can accommodate adults, children, and pets comfortably:
The Queen and Olympic Queen can also accommodate pets and children, but in doing so, the available space gets a bit crammed.
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 important to consider whether you live on the ground floor, a storey above ground, or in a high-rise.
Whatever your situation, make sure you arrange for the mattress to be delivered and installed in tip-top condition.
If you are too tall for a mattress, your feet will likely hang over the edge - a pretty uncomfortable way to sleep. So, your height is also another important factor to consider when choosing the right mattress size.
If you're 6 feet or taller, go for mattresses at least 80 inches long. The best mattress size for taller people is usually a queen or king, while the best mattress size for shorter people is usually a twin or full size.
Latex, memory foam, polyfoam, cotton, and wool are all materials commonly used in mattresses. A latex mattress is made from naturally obtained rubber sap and is renowned for its responsive, supportive surface. A memory foam mattress is the exact opposite, as it’s made of synthetic foam and provides more cushioning than support.
Besides these all-foam mattresses, there are also the hybrid mattress and the innerspring mattress. Hybrid mattresses combine modern pocketed coils with a thicker layer of foam, while innerspring mattresses combine traditional spring coils with a thinner layer of foam/fabric.
Knowing which mattress material suits your body’s contours and pressure points can go a long way in helping you identify the best mattress.
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 $300+ for a twin bed to $1000+ for a queen, depending on materials and brand. Larger mattresses cost more, so opting for a smaller size can save you money. But we always recommend considering a long-term investment, even if it's slightly costlier.
Get a good mattress that lasts 10+ years (like our Organic Latex Mattress) and supports your health. Don't sacrifice sleep quality for savings. A high-quality mattress is always worth the price.
So, there you have it: our comprehensive guide to mattress sizes and dimensions. Buying a 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 new mattress as it is to be informed about the food you eat.
Calculating the difference between the size of your room and your bed is a good place to start. Then, think about who else will be sleeping with you, the materials with which the mattress is made, and your budget. Now that you have all these data points, you can make an informed purchase without regretting it later!
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 bed, learning how to measure a mattress is a nice skill to have. 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.
The different sizes of mattresses that are common all across the country include:
Traditionally, the twin mattress was the best mattress for single sleepers. People who are taller than 6 feet will benefit from a twin XL mattress, as a standard twin cannot accommodate their height. If you are not bothered by budget or space, and your top concern is getting luxury sleep, then invest in a full- or queen-size mattress.
The best mattress for couples in the United States is a queen, which measures 60 inches wide by 80 inches long. It is spacious and versatile enough for two people, more budget-friendly than a king bed, and quite comfortable to sleep on.
The king (76 wide x 80 long) and California king (72 wide x 84 long) are the best mattresses for small families to sleep comfortably together. For larger families, the Texas king, Alaskan king, Wyoming king, Vermont king, or family XL oversized mattresses are recommended.
Queen-size mattresses are usually a good choice for guest rooms because they can accommodate couples and single guests comfortably without taking up too much space. But if your guest room is smaller, or if you only host single guests, a full-size mattress might be more appropriate.
The largest mattress size (that you can actually find in stores) is the Alaskan king, which measures 108 inches wide and 108 inches long. But, there is an even larger bed - the Family XL mattress, which measures 144 inches wide and 84 inches long. It's meant to house big families, is rare to find in stores, and you'll likely need to custom-order it online.
Two twin XL mattresses together, side by side, make a standard king-size bed. A king-size bed is 76 inches wide and 80 inches long, and two twin XL mattresses are each 38 inches wide and 80 inches long.
Yes, a latex mattress is available in every standard US mattress size. Here are all the latex bed sizes in order and who they best suit:
→ For toddlers: A twin latex mattress or a twin XL latex mattress is ideal for children outgrowing their crib beds.
→ For teenagers, single adults: A full latex mattress is perfect for teens and solo adults to sleep comfortably.
→ For couples: A queen latex mattress is spacious enough to accommodate couples on a budget.
→ For couples, families: A king latex mattress or a California king latex mattress is recommended for couples who need space and families who sleep together.
Yes, sleeping position does matter when choosing mattress dimensions. Side sleepers and combination sleepers need more width to allow for frequent shifting. Back sleepers and stomach sleepers usually manage with less width since they move less during sleep.
Related blog posts:
5. Wyoming King vs. Alaskan King vs. Texas King
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.
