Mattress Size

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Mattress Sizes and Dimensions:
Which Bed Size Is Right
For You?

Mattress Size Guide Chart

  • Twin: 38” x 75” | 96.5 X 190.5cm
  • Twin XL: 38” x 80” | 96.5 X 203cm
  • Full: 53” x 75” | 134.5 X 190.5cm
  • Queen: 60” x 80” | 152.5 X 203cm
  • King: 76” x 80” | 193 X 203cm
  • California King: 72” x 84” | 183 X 213cm

Beyond personal preference, there are a number of factors to consider before picking a mattress size. You’ll want to think about the size of your bedroom, who you’ll be sharing your bed with, and available space.
In this guide, we illustrate the dimensions of all six standard mattress sizes to help you choose the best one for your needs. We also answer some commonly asked questions when it comes to bed sizes and choosing a mattress.


Twin bed dimensions: 38” x 75”

Best for: kids, bunk beds or single sleepers.
Room size: The minimum room size for a twin bed to fit naturally is 7 x 9 feet. An 8 x 10 square foot room may be required for the bed to fit with other furniture, such as a desk or dresser.
A twin mattress is the smallest bed on the market at 38 inches wide and 75 inches long. Its compact footprint makes it ideal for single sleepers — either children or adults with small spaces like a studio apartment.

Twin XL

Twin XL bed dimensions: 38” x 80”

Best for: taller teenagers, single adults or anyone with limited space.
Room size: The minimum room size for a twin XL bed to fit naturally is 8 x 10 feet. Twin XL beds can also work well in narrow rooms that are at least 7 feet wide.
The twin’s slightly longer cousin, the twin XL mattress, is the most popular size for college dorm rooms. It measures five inches longer than a twin, at 38 inches wide and 80 inches long. In addition to students, a twin XL mattress is a good solution for taller teenagers and individual adults with limited space. These beds can also be put together if you’re choosing a split king adjustable base for full body adjustability!


Full size bed dimensions: 53” x 75”

Best for: young adults, couples who like to cuddle or guest rooms.
Room size: The minimum room size for a full bed to fit comfortably is 10 x 11 feet.
The full mattress is a good starter mattress for young adults or recent grads living on their own for the first time. Sometimes called a double, the full is 16 inches wider than a twin at 53 inches wide and 75 inches long. A full is not recommended for couples who like to share the bed with pets or their children, but it’s a smart choice for guest rooms.


Queen size mattress dimensions: 60” x 80”

Best for: couples or adults who like to sprawl out.
Room size: The queen mattress fits best in a master bedroom that is at least 10 x 10 feet.
The most popular mattress size on the market is the queen mattress, which is traditionally used in a master bedroom. At 60 inches wide and 80 inches long, the queen offers plenty of space for couples or individuals who like having extra room to move around in bed.


King size bed dimensions: 76” x 80”

Best for: couples who enjoy their space or share a bed with children.
Room size: A king mattress fits best in a spacious master bedroom, preferably at least 12 x 12 feet.
At 76 inches wide and 80 inches long, the king mattress is large enough to accommodate couples who share the bed with their children or a sizable pet (think: a Great Dane). A king bed can be made of two twin beds pushed together, which is referred to as a split king. King beds are large enough that both sleepers can sprawl out with room to spare.

California King

California king bed dimensions: 72” x 84”

Best for: couples with kids or pets who want a luxurious amount of space.
Room size: A California king mattress fits best in a large master bedroom of at least 12 x 12 feet.
The longest mattress on the market, the California king mattress is a whopping 72 inches wide and 84 inches long. Its generous length makes it ideal for taller individuals, especially people more than six feet tall. Of course, people of average height might also benefit from a California king depending on how many people and pets are sharing the bed.

Which Bed Size Is The Best For Me?

If it’s time for a new mattress, you may be wondering which size is right for you. There are many things to consider, like who will be sleeping in the bed, how much space you will need, how much room is in your bedroom, and any specific health or sleep issues you might face.
Buying a new mattress is not a one-size-fits-all situation, so it’s essential to evaluate your individual needs. If you have a history of back pain or sleep problems, you may want a free trial period to help you make sure you’re comfortable with your new mattress.
Here are some other major factors you will want to consider when choosing a mattress.

Who Will Sleep In the Bed

Will you be sharing the bed with a partner? Do your children or dogs typically sleep with you? These are questions to ask yourself before deciding on mattress size. Typically twin, twin XL, and full mattresses are meant for one person. The queen, king, and California king beds are big enough for two sleepers.
If you are going to sleep with another person, consider how close you like to sleep and your usual sleeping positions. If you both like to stretch out when sleeping, the extra room afforded by a king or California king will be appreciated.

Your Room Size

The amount of space available to you should also be considered. A larger mattress will take up more space in your bedroom, so you will need to plan accordingly.
Here are the mattress sizes in square inches and square feet. Ensure there is plenty of space for the mattress in your room.

  • Twin: 2,925 sq. in./20.3 sq. ft.
  • Twin XL: 3,120 sq. in./21.7 sq. ft.
  • Full: 4,050 sq. in./28.1 sq. ft.
  • Queen: 4,800 sq. in./33.3 sq. ft.
  • King: 6,080 sq. in./42.2 sq. ft.
  • California King: 6,048 sq. in./42 sq. ft.

Your Body Size

You should take your height and width into consideration when choosing a mattress. A typical twin mattress is 75 inches long, while a twin XL is 80 inches long. If an individual is taller than six feet two inches, a twin mattress is probably not for them. Instead, it’s best to go with the XL, full, queen, or king bed, all of which can accommodate someone who is up to 6 feet 7 inches.
Those that are taller than 7 feet should opt for a California king bed. For those who want more space on either side of their body, a full, queen, or king bed will be the most comfortable.

Your Budget

The amount of money you are willing to spend on a mattress can also help you choose the right size. A king will cost more than a queen, and a queen more than a full, etc. Buying a mattress that meets both your size needs and your financial needs is key.
To learn more about in-depth comparisons between mattress sizes, take a look at our following articles: