Full Size Bed Dimensions: Everything You Need to Know About Full Size Mattresses

/ April 16, 2021

Do you live by yourself, or are you squeezed into a tiny apartment with your partner? Does your growing child need a new bed?

These are all situations that favor a full size bed, a popular pick among solo sleepers, couples who live in small spaces, and growing children. That's because a full bed is roomier than a twin size bed yet doesn’t take up as much space as a queen size bed.

person lying on full size bed with guitar next to them

But how big, exactly, is a full size mattress, and will it work in your bedroom and your life?

Here, we’ve put together everything you need to know about full size mattress dimensions, the pros and cons of choosing this mattress size, and how to tell if it’s right for you.

We’re also explaining how full size bed dimensions compare to other mattress sizes and answering the most commonly-asked questions about full size beds.

Full bed dimensions

Full bed dimensions ride that line between not too big and not too small. Full size beds measure 54 x 75 inches. Standard full size beds have the same measurements as double beds, so you'll often see these two terms used interchangeably.

While full XL mattresses are much less common than standard full mattresses, at times, it is possible to find this size. It measures 54 x 80 inches, making it 5 inches longer than a standard full.

Below, you’ll find a chart of standard full size bed dimensions in the most common units of measurement.

Full Size Mattress Dimensions


54 x 75 in


4.5 x 6.25 ft


134.5 x 190.5 cm


1.345 x 1.905 m

Benefits of a full size mattress and bed

If you’re thinking through full size mattress dimensions to determine whether this size is a viable option, weigh these benefits and drawbacks.

Pros and cons of a full size mattress

Pros of a full size mattress

Cons of a full size mattress

Ample room for solo sleepers

Not enough space for couples

Fits well into smaller bedrooms

Not long enough for taller teens or adults

Great option for growing children

Not spacious enough for heavier individuals

Less expensive than larger mattress sizes

Not enough room for pets to join

Is a full size mattress right for me?

Here, we’ll break down the top considerations you need to ponder before buying a full size mattress.

Who will sleep in the bed

Because a full size mattress is only 54 inches wide, it doesn’t provide adequate space for most couples. In a full size bed, each person will only have 27 inches of space for themselves. That said, if you’re not physically large and don’t mind snuggling, it could be just fine. Additionally, because they’re not especially long, full size beds aren’t a great option for tall folks. A full size bed is just barely over 6 feet in length, so you’re looking at feet hanging over the edge of the bed if you’re a few inches over 6 feet.

Desired comfort level

When buying a full mattress for a child, keep in mind that toddlers and younger children need a medium firm mattress to adequately support their growing bodies.

For solo sleepers, take your sleep position into account—a softer mattress is ideal for side sleepers, a medium firm mattress is good for back sleepers, and a firmer mattress is best for stomach sleepers.

Your room size

If you’re working with somewhat limited space, a full mattress could be right up your alley. For example, if you live in a one-bedroom apartment with a diminutive bedroom or you’re looking to fill a kids’ bedroom, a full mattress could be a good fit. The minimum recommended room size for a full size bed is 10 x 10 feet.

illustration with full size bed in it showing room dimensions of 10 feet by 10 feet

“The biggest consideration is who is sleeping in it, how often, and does it suit the room?” says Prudence Bailey, founder and principal designer of Prudence Home + Design in Connecticut. “A full bed is more nimble in small room situations, and since it’s a little wider than a twin, you can run it along a wall length with a great headboard and it can serve two purposes: a bed or a sofa for lounging with friends—this is especially great in teen bedrooms.”

If you have a small bedroom with a full size bed, you may want to avoid nightstands because they take up serious real estate. A platform bed can incorporate storage, so that may be something to consider. Getting creative with wall shelving can also help maximize your space.

illustration showing teenagers lying on full size bed and sitting in bedroom

Your body size

While full mattresses may be good for heavier individuals, they may not provide enough space for heavier couples. (Learn about the best mattress for heavy people.)

Your budget

You’ll be happy to know that full size mattresses are less expensive than their larger counterparts. For instance, full size beds are usually 10% to 15% less than queen size mattresses of the same style and brand. A full size innerspring mattress will be the most affordable type of mattress since it tends to run less expensive than other mattress types.


Whether you’re buying a full mattress or another size, if you sleep hot, you may want to skip memory foam since it can trap heat. Innerspring and latex mattresses sleep the coolest, resulting in improved sleep.

Motion isolation

For full mattresses and beyond, a memory foam mattress is the best at reducing motion isolation, while on an innerspring mattress, you may feel yourself or your partner moving around, which can disturb sleep.

Other types of full size mattresses

Do full size mattresses come in other mattress sizes? Here, we’ll answer that question.

illustration showing the difference between full size bed and full xl bed dimensions

Double mattress

Full size beds and double mattresses are the same. They both measure 54 x 75 inches.

Full XL mattress

As the less common version of the full mattress, a full XL measures 54 x 80 inches. If you can track down a full XL mattress, you’ll find that it’s a great option for taller teens or adults and could work nicely in a dorm room if there’s enough space to fit it.

Full mattress vs. other mattress sizes

As you weigh the pros and cons of various mattress sizes, you can familiarize yourself with how the full mattress compares to the queen size mattress.

Full vs. queen

While a full mattress offers plenty of room to solo sleepers and a cozy situation for couples, a queen mattress provides even more space with 6 additional inches in width. A queen size mattress measures 60 x 80 inches.

A full mattress is an excellent choice for small spaces, but a queen will likely be too large and overwhelm a room. Also, full size beds are great for children, but queen mattresses will simply be too big for them.

Other mattress sizes

If you’re not completely sold on a full mattress, there are lots of other mattress options to explore. These articles will provide the information you need as you make your decision.

Full bedding sets and accessories

Once you’ve picked your full mattress, the work isn’t quite done! Next, you’ll need to think through bedding and your foundation.

  • Sheets: Full sheet sets usually come with a flat sheet, a fitted sheet, and two pillowcases. For full XL mattresses, you’ll need to look for a corresponding full XL sheet set, which can be tough to find since it isn’t a standard mattress size. Try this organic percale sheet set.
  • Pillows: A standard pillow will be your best option for a full size bed—they measure 20 x 26 inches. You can fit two standard pillows across a full size bed comfortably. A standard pillow will fit into a standard pillowcase. Check out this ultra-supportive latex pillow.
  • Mattress protector or pad: Are you buying a full mattress for your child? In this case, we recommend purchasing a waterproof mattress protector or mattress pad to protect against accidents. Keep in mind that they’re good for adults too since they safeguard against spills, stains, and bed bugs.
  • Mattress foundation: A full mattress can be paired with several foundation types—just be sure to double-check with the manufacturer to see what your mattress is compatible with. A traditional box spring foundation used to contain actual springs in a wood box, but today, it’s more of a fabric-covered or exposed wood frame that supports the mattress and creates a comfortable height for your bed. A platform bed is a modern option meant to be used without a foundation since the mattress rests directly on the platform. An adjustable bed base will work as well.

Full size mattress FAQs

Without fail, there are common questions that come up when shopping for a full size mattress. We’re here to help you with your shopping process by answering these questions.

Are full size mattresses the same as double beds?

Full size mattresses and double beds are the same. Both measure 54 x 75 inches.

Is a full size mattress big enough for two people?

A full size mattress can fit two people of small or average size, however, know in advance that it will be a bit on the snug side. It may not be roomy enough for two larger people. Because a full size mattress measures only 54 inches in width, it often doesn’t provide enough space for couples and is instead a better option for solo sleepers.

Can queen sheets fit on a full bed?

Queen sheets usually measure 60 x 80 inches, while full sheets typically measure 54 x 75 inches. A fitted queen sheet will be loose on a full size bed and will not fit properly. It’s best to look for a full size sheet set instead.

What’s the difference between a full and full XL mattress?

A full size mattress measures 54 x 75 inches, while a full XL mattress is 54 x 80 inches. A full XL is 5 inches longer and is much less common than a standard full mattress.

What’s the difference between a full XL and queen bed?

A full XL mattress measures 54 x 80 inches and a queen mattress measures 60 x 80 inches. A full XL is slightly narrower than a queen.

What’s the difference between a queen size bed and full size mattress?

A queen size bed measures 60 x 80 inches and a full size measures 54 x 75 inches. A full mattress is slightly narrower and shorter than a queen.

What’s the difference between a full size mattress and a twin size mattress?

A full size mattress measures 54 x 75 inches, while a twin measures 38 x 75 inches. A full is 16 inches wider than a twin.

How wide is a full size bed frame?

A standard full size bed frame is 54 inches wide.

What room size is best for a full size bed?

At minimum, you’ll want to place a full size bed in a room that measures 10 x 10 feet. If you go any smaller than that, your room may feel too cramped. Ideally, you’ll place a full size bed in a room that’s 10 x 12 feet.

Why choose a full size mattress?

It’s a good option for solo sleepers since it offers plenty of room for individuals and is less expensive than a queen or king. A full mattress is also a smart pick for growing children since it should comfortably fit into a child’s bedroom.

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