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
The right bed size comes down to who’s sleeping in it, the size of your room, your budget, and more. These are the typical dimensions of each mattress size, along with the room size they require.
Twin
Dimensions: 38-by-75 inches
Recommended room size: 8-by-11 feet
Best for: Single sleepers, typically children
Budget: Twin Purple mattresses starting at $999
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
Dimensions: 38-by-80 inches
Recommended room size: 8-by-12 feet
Best for: Tall single sleepers, primarily teens and in college dorms
Budget: Twin XL Purple mattresses starting at $1099
Twin XLs are as wide as standard twins but are 5 inches longer, making them ideal for taller sleepers. In shared or smaller rooms, a twin XL can provide more length to stretch out without taking up much extra space.
Most colleges furnish dorm rooms with twin XL mattresses, so you can easily find bedding and accessories in home stores or online.
Placing two twin XLs together in one bed frame makes a split king, allowing each sleeper to choose a mattress that meets their needs.
Full
Dimensions: 54-by-75 inches
Recommended room size: 11-by-11 feet
Best for: Single sleepers or cuddly couples
Budget: Full Purple mattresses starting at $1,399
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
Dimensions: 60-by-80 inches
Recommended room size: 10-by-12 feet
Best for: Single sleepers, couples, or even pets
Budget: Queen Purple mattresses starting at $1,499
As the most popular bed size on the market, queen mattresses offer suitable space for two sleepers at a lower price than the king size.
You’ll typically find them in primary bedrooms, though queens are also great for guest rooms. Their popularity makes it easy to find bedding and accessories like a queen size bed frame to fill your space.
King
Dimensions: 76-by-80 inches
Recommended room size: 12-by-12 feet
Best for: Two sleepers who sprawl or small families
Budget: King Purple mattresses starting at $1,999
The widest option among standard sizes, the king mattress appears luxurious in large primary bedrooms.
Many brands make split king mattresses. With the same measurements as a king, split kings allow for customized sleep experiences with different firmness or elevation levels when paired with an adjustable base.
California King
Dimensions: 72-by-84 inches
Recommended room size: 12-by-12 feet
Best for: Two taller individuals, plus pets
Budget: California king Purple mattresses starting at $1,999
Although narrower than a standard king, California king mattresses are the longest standard bed size, with 4 extra inches to stretch your legs or as a place for Fido to keep your feet warm.
Considerations for your mattress size
Mattresses directly impact the quality of your sleep. When choosing the right mattress, keep these factors in mind:
Consider your partner
Who will you share the mattress with? Queens may be a popular bed size for couples, but a king mattress might be better for those who co-sleep with children or pets.
Assess your room size
Leave at least 2 feet of space around each side of the mattress, with more space for additional furniture. Consider door and staircase widths for maneuvering your mattress.
Account for your body size
Most beds are wide enough for one person but may not be long enough. For someone 6 feet or taller, consider mattresses at least 80 inches long. Mind mattress weight limits to ensure proper support and durability.
Accommodate sleep positions
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.
Set your budget
Understand what influences mattress prices: size, quality, and mattress type. High-quality mattresses cost more but last longer and offer more support.
Keep future plans in mind
Mattresses are a long-term investment. While a small mattress may be fine now, if you plan to move with your mattress or grow your family soon, 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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Bed size frequently asked questions
For single sleepers, a twin, twin XL, or full bed would be best in a smaller bedroom, especially if you have furniture like a dresser or nightstand.
Couples can make a full size bed work, though a queen is more spacious if your room can accommodate it.
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
For single sleepers, a twin, twin XL, or full bed would be best in a smaller bedroom, especially if you have furniture like a dresser or nightstand.
Couples can make a full size bed work, though a queen is more spacious if your room can accommodate it.
A 60-by-80-inch bed is a queen mattress. Like most standard bed sizes, it is longer than it is wide.
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.