Bed Sizes and Mattress Dimensions: A Complete Guide + Chart
Is it time to replace your mattress? This mattress dimensions guide covers all six standard bed sizes to help you select the mattress that best suits your needs.
Bed Sizes Chart
While mattress sizes vary from brand to brand, the chart below shows the typical dimensions of each bed, along with sleeper profiles and the recommended minimum room size.
| Bed Size | Dimensions | Minimum room size | Number of sleepers | Maximum sleeper height |
|---|---|---|---|---|
|
38" x 75"
|
7' x 9.5'
|
1
|
<6'
|
|
|
38" x 80"
|
8' x 10'
|
1
|
6" to 6'4"
|
|
|
54" x 75"
|
9' x 9.5'
|
1-2
|
<6'
|
|
|
60" x 80"
|
10' x 10'
|
1-2
|
6' to 6'4"
|
|
|
76" x 80"
|
12' x 12'
|
2+
|
6' to 6'4"
|
|
|
72" x 84"
|
11' x 13'
|
2
|
6'5" or taller
|
Twin
Recommended Room Size: at least 7’ x 9.5’
Best for: Single sleepers, typically children
The twin mattress size is the smallest of all standard bed sizes. Also known as a single bed, the twin’s narrow width accommodates most younger sleepers and fits well into small or shared bedrooms. They also make ideal daybeds and are suitable for bunk beds.
Twin XL
Recommended Room Size: at least 8’ x 10’
Best for: Tall single sleepers, primarily teens and in college dorms
With the same width as the standard twin size but 5 inches longer, Twin XLs are ideal for taller sleepers. In rooms with limited space, it can provide optimal length to stretch out without taking up much extra square footage.
Placing two twin XLs together in one bed frame creates a split king, allowing for independent movement on adjustable bed frames.
Full
Recommended Room Size: at least 9’ x 9.5’
Best for: Single sleepers, like teens, or cuddly couples
Otherwise known as a double bed, a full mattress is a spacious choice for young adults who toss and turn in their sleep. It’s affordable and versatile, making it a popular choice for individuals furnishing their first solo apartment or for use in guest rooms.
Queen
Recommended Room Size: at least 10’ x 10’
Best for: Single sleepers, couples, or even pets
The most popular bed size on the market, queen mattresses offer suitable space for two sleepers. You’ll typically find them in primary bedrooms, though queens are also great for guest rooms that see frequent visitors. Their popularity makes it easy to find bedding, accessories, and bed frames.
King
Recommended Room Size: at least 12’ x 10’
Best for: Two sleepers with room to sprawl or small families
The widest option among standard bed sizes, the grandiose king size mattress appears luxurious in extra-large primary bedrooms.
Many brands, like Purple, make split king mattresses. With the same measurements as a king, split kings are two Twin XL mattresses that allow for customized sleep experiences with different firmness or elevation levels when paired with an adjustable base.
California King
Recommended Room Size: at least 11’ x 11’
Best for: Two taller individuals, plus pets
Although narrower than a standard king, California king mattresses are the longest standard bed size. In comparing kings to California king beds, the latter offers 4 extra inches to stretch your legs or as a place for Fido to keep your feet warm.
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If there's something wrong with your mattress, we'll replace it for up to 10 years, starting from the date of original purchase.
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Get your mattress shipped straight to you at no extra cost – with complimentary white-glove delivery available on select mattresses. If you don’t love your mattress, just contact a Sleep Genius to confirm eligibility and arrange a return.
To be eligible for a return, you must be within the 100-night trial period and have had the mattress for at least 21 days; the mattress must also be clean and undamaged. You will be refunded the full mattress price minus the value of any discount, interest accrued, and transportation charges.
For questions about products purchased at a retail location, please contact the store directly.
Considerations for Your Mattress Size
Keep these factors in mind when choosing the right mattress.
Sleeping Partner
Who will you share the mattress with? Queens may be a popular bed size for couples, but for couples with children or pets, a king might be best option.
Room Size
Leave at least two feet of space around the mattress to ensure you can move around comfortably. Also, consider door and staircase widths for maneuvering your mattress.
Body Size
Most beds are wide enough for at least one person but may not be long enough. For someone 6 feet or taller, consider mattresses at least 80” long.
Sleep Position
Consider how much space you need based on your sleep position. If you move around when you sleep, are a side or combination sleeper, or just want extra space, go for a wider mattress.
Budget
Understand what influences mattress prices: size, quality, and mattress type. High-quality mattresses may cost more, but can last longer and support your body better.
Future Plans
Mattresses are a long-term investment. While a smaller mattress may be the right fit now, if you plan to move with your mattress or grow your family within the next 5 to 10 years, consider the next size up.
Find your perfect mattress
We’re here to help you find that just-right fit — take our Mattress Quiz for personalized recommendations based on your sleep habits (and hurdles).
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Frequently Asked Questions
The six standard mattress sizes in order of smallest to largest are:
- Twin: 38-by-75 inches
- Twin XL: 38-by-80 inches
- Full: 54-by-75 inches
- Queen: 60-by-80 inches
- California king: 72-by-84 inches
- King: 76-by-80 inches
While the six standard mattress sizes suit most sleepers, some individuals may require a nonstandard bed size. Families who co-sleep with multiple children or pets and tall or heavier individuals may sleep better in a bigger bed. Keep in mind that most nonstandard bed sizes are much less common and typically only sold online or as custom made-to-order mattresses.
Oversized Mattresses
Anything larger than a standard king bed is considered an oversized mattress. Below are a few of the most well-known extra large mattresses.
- Olympic queen: 66-by-80 inches
- Wyoming king: 84-by-84 inches
- Texas king: 80-by-96 inches
- Alberta king: 96-by-96 inches
- Alaskan king: 108-by-108 inches
- Family beds: 108 to 144 inches in width and 80 to 84 inches in length
Other Specialty Mattresses
The following bed sizes are examples of specialty mattresses, several of which are most common in RVs or other camping or recreational vehicles with sleeping areas.
- Full XL: 54-by-80 inches
- Short queen: 60-by-75 inches
- Short king: 72-by-75 inches
- Super king: 72-by-78 inches
The smallest standard bed size is the twin mattress, measuring 38 inches wide and 75 inches long. Some mattresses made for infants and young children are available in smaller dimensions from children’s mattress manufacturers. The four most common children’s bed sizes are:
- Bassinet: Traditionally about 15-by-30 inches
- Mini crib: About 24-by-38 inches
- Standard crib: About 28-by-52 inches
- Small single: 30-by-75 inches
A 60-by-80-inch bed is a queen mattress. Like most standard bed sizes, the longer side of a queen bed is its length, and the shorter side is its width.
Yes, full mattresses are big enough for two people, but couples with specific sleeping preferences might benefit more from a king or queen compared to a full bed. Alternatively, you can get two twin XLs to create a split king and use an adjustable frame.
Queen is the most popular mattress size as it suits both single sleepers and partners. Shopping for accessories like sheets, duvets, and bed frames is easy as well, as most home stores sell queen size accessories.
While standard pillow sizes are often good enough for most sleepers, those who sleep on a queen or king mattress may prefer the corresponding pillow size. If you tend to toss and turn in your sleep, buying a larger pillow can also help enhance your sleep.