Mattress Sizes and Bed Dimensions Guide

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Written by: Alex Savy
Read 7 minLast updated on September 17, 2021

The size of your mattress is as important as its firmness and materials. Because if you don’t get enough space in your bed, you’ll hardly feel comfortable. 

Also, you need to know how much space your bed takes in your bedroom to build an aesthetically pleasing furniture layout.

This mattress sizes chart and bed dimensions guide will kill two birds with one stone and give you all the answers you need, so get cozy and continue reading.

Mattress Sizes and Dimensions: Standard and Less Common Ones

Mattress Sizes and Dimensions- Standard and Less Common Ones


So, the standard mattress sizes chart typically includes five sizes:

  • Twin;
  • Twin XL;
  • Full;
  • Queen;
  • King;
  • California King.

These are available in line-ups of most mattress brands.

However, there are also a couple of sizes that have lower market demand, such as:

  • Crib mattresses;
  • Full XL mattresses.

I will cover the difference between all the sizes and will briefly explain who will benefit the most from each of them right below.


Crib mattresses measure 28” x 52” and are used, as the name implies, in cribs. A standardized mattress size makes it easier to select a bed frame design and a mattress itself because you know that they will fit anyway.


A Twin-size mattress is also known as Single, meaning it provides sufficient space to accommodate a single adult. Twin mattresses measure 38” x 75” and their surface area is 2,850 or 19.8 sq.ft.

Today, though, Twin beds are mostly used in kid’s bedrooms — particularly in bunk beds — or by individuals who sleep alone and have limited space.

Twin XL

A slightly longer cousin of the Twin bed, Twin XL, measures 38” x 80” and will suit best individuals who are taller than 5’5”. A Twin XL bed takes 21.1 sq.ft of space and its surface area is 3,040

The most common use of the Twin XL mattress is for dormitories around the world, but you can also get one for your rapidly growing kid.

Also, two Twin XL mattresses make a split King mattress.


A Full-size mattress can accommodate two average adults, which is why it’s also called Double.

A Full bed measures 54” x 75”, which makes its surface equal to 4,050 The area a Full bed will take in your bedroom is 28.1 sq.ft.

Today, Full beds have also moved to kids’ rooms, as they offer plenty of space for an average teenager. However, some hosts of big houses may use them for guest rooms.

Full XL

A slightly larger cousin of the standard Full bed, Full XL measures 54” x 80” and has a surface area of 4,320 To place a Full XL mattress, you need to have 30 sq.ft of space. 

Those extra five inches may make a difference for individuals who love to sprawl on their bed. However, since these mattresses typically have lower market demand, they might be more challenging to find. Plus, if you’re six feet tall, a Full XL bed might still feel too small for you.


Queen is the most popular size on the market (1). It measures 60” x 80”, which makes its surface area 4,800 A Queen-size bed will accommodate two average adults more comfortably than Full and won’t take too much space in your bedroom —  only 33.3 sq.ft, which is about one third if we speak about a standard 10 x 10 ft bedroom.

“Since Queen is the most popular mattress size on the market, you’ll never have problems with finding bedding items or accessories.”


We’re moving to the larger size of the mattress chart: a King-sized mattress measures 76” x 80”, which makes it the widest option on the market. Its surface area is 6,080, and the bed will eat 42.2 sq.ft of your bedroom space.

King mattresses are a good pick for a large couple, those who love to have more freedom to move, or people who let their kids or pets sleep with them.

California King

A California (or Western) King mattress is very similar to the standard King mattress, except that it’s 4 inches narrower and 4 inches longer. Simply put, a Cal King mattress measures 72” x 84” and its surface area is 6,048 square inches. It also takes slightly less space than the standard King mattress — 42 sq. ft. But you still need a bigger master bedroom to fit it in.

A Western King mattress is a good pick for tall individuals (6 feet or taller) and taller couples. It also fits better into narrower bedrooms, thus creating a more pleasing layout.

Mattress Type

You might not know this, but the type of your mattress can also determine what size you might need. Why? Because all of them offer different levels of edge support. And if your mattress has weak edges, it can limit your sleeping space (which might be an especially serious issue if you share your bed with a significant other).

Allow me to give you a simple example. Let’s say you and your partner are currently sleeping on an old innerspring Queen mattress. If you decide to opt for a new one and choose memory foam, for example, you might want to invest in the King size. You see, memory foam, polyfoam, and latex typically have rather weak edges, so you won’t be likely to feel 100% comfortable when sleeping near the edge on such a mattress. Therefore, if you and your partner need all the mattress space you can get, it’s better to choose a larger size.

Of course, there’s another option, which would work if you don’t have enough space for a larger mattress. You can simply buy a model that has sturdy edges. This way, a smaller size would be appropriate. Innerspring and hybrid mattresses usually have the sturdiest edges and can offer some extra sleeping space.

Things You Should Consider to Choose the Right Mattress Size

Choosing the right bed dimensions involves considering a lot of things, and simply knowing what you get from each mattress size isn’t enough. You also need to keep in mind your surroundings, way of life, and even your plans for the nearest future.

So, let’s take a more detailed look at all of this.

Room Size

Your mattress isn’t the only item in your bedroom, but it’s likely that it’s the largest one and that other pieces of furniture will be centered around it.

That’s why the room size should be the first thing to consider when you’re choosing a mattress size.

See for yourself:

A Twin-size mattress takes slightly more than 20 square feet, whereas a California King bed will eat 42 square feet of your room!

A drastic difference!

Also, you need to ensure at least a 2-feet walkway around the bed in order to be able to change the bedding easily and get in and out of bed without bumping your fingers.

“The minimum comfortable space for a Queen-size bed is a 10 x 10 feet bedroom. If you want a King-size bed, make sure that the wall you’ll be placing your bed’s headboard at is at least 13 feet long.”

Who Will Sleep in It

Your partner’s and your sleeping style will also influence the choice of the mattress size. For example, if you’re a devoted fan of the starfish position, you may consider going for at least King to leave some space for your bedmate. The same applies if one of you or you both are large sleepers, as in this case, you will need more space per person to easily move around without squashing each other.

“You may consider purchasing a split configuration if you and your partner have different firmness preferences. Split mattresses allow you to choose two independent halves and place them on the same bed frame. Note that this option is available only for King and Cal King mattresses.”

Moving Situation

Here comes the ‘future’ part.

If you plan to switch homes soon, you’ll probably be leaving your mattress in the current dwelling instead of dragging it across the city — or country.

That’s why it’s better to optimize the process and measure your future bedroom beforehand, so you can order the mattress to be delivered to your new home.


Finally, think about how much money you are willing to spend on a mattress. I’m listing it as the last point of this mattress size guide because I believe that there are a lot of more important things than a price tag.

However, to ease your search, here are the general guidelines:

  • Twin and Full mattresses are on the budget side because they come with certain limitations, such as the limited space per person or inability to properly fit a heavy user.
  • Queen mattresses typically have the best value for money, which is another reason behind their popularity, so if you want to find the most cost-efficient option for two sleepers, go for this size.
  • King and California King typically are the most expensive options because they require more resources to be manufactured and you literally pay for comfort (especially in the case of the split option).

So, have you determined the right bed size for you? Which is it and why? I’d love to see your thoughts in the comments below.


  1. Alia Hoyt (2019, May 19). Bed Sizes Are Totally Getting Bigger. Retrieved from

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