Mattress Sizes Chart and Bed Dimensions Guide

If you ever had to shop for a new mattress, you certainly know how difficult this task can be. It seems like an easy peasy situation, but the truth is there are so many choices you will have to make, and so many hours of research to spend in front of your computer, just so you can realize what is that you need.

It sounds crazy, but it is the truth. There is the matter of the mattress feel, the way it was built, the features it needs to have, and etc. But one of the most important factors you have to decide at the beginning is its size.

There are a couple of things you should consider in order to realize what’s the right fit for you regarding the mattress dimensions. The first one is how tall you are and what kind of sleeper you are, then there is the question if you sleep alone, or with your partner, after that, you must take into consideration if your kids or pets have a habit of crawling in your bed during the night, and so on.

As you can see, this is a seriously important topic, so let’s see what your options are and what sizes of mattresses there are on the market. 

Mattress Size and Dimensions Comparison

Crib – 27×52 Appropriate for newborn babies and early toddlers. Size is regulated by the government, so it fits the standard cribs perfectly.

Small Single – 30×75 This is a transitional bed for kids after they can’t fit the crib anymore. It won’t take too much space, and it’s quite narrow.

Twin – 38×75 The smallest standard-sized mattress that’s suitable for children, but also small spaces, guest rooms, and bunk beds.

Twin XL – 38×80 Five inches longer than twin mattress and quite economical, it’s perfect for young adults and students, or as the temporary sleeping solution for grownups.

Full – 54×75 Suitable for a single person given it has quite an amount of space, but also for couples who live in a small apartment.

Full XL – 54×80 A bit longer version of standard full bed is great for taller individuals or people who like having a spacious bedroom.

Queen – 60×80 Most popular bed size, perfect for couples but also individuals who like to sprawl out while sleeping.

Olympic Queen – 66×80 Suitable for RVs, mobile homes and camper trailers. It is six inches wider than the standard queen and much more comfortable.

King – 76×80 Luxuries sleeping solution for couples who live in a spacious home. The widest bed in the market.

California King – 72×84 The perfect choice for tall people who like sleeping comfortably. It is the tallest mattress in the market.

Crib Dimensions

We all first start sleeping on a little mattress that can perfectly fit standard cribs. The size of this sleeping surface is regulated by the federal government for safety reasons, and it’s always the same, there are no variations when it comes to its size.

The crib mattress is 27 inches wide and 52 inches long, and it’s appropriate for newborns and toddlers. Also, according to the regulations, the crib mattress should not be thicker than six inches, and it needs to be much firmer than an adult bed, again for the sake of the baby’s safety.

Small Single Dimensions

When your babies become too big to fit in a crib, it is time to get them a real grownup bed, the one that will be appropriate to their size and their needs.

We are talking about a small single sleeping surface that represents the perfect transitional bed for our youngest. It is 75 inches long and 30 inches wide, so it will be a great addition to the kid’s room since it won’t take too much space.

This mattress is quite narrow, so make sure to find an adequate bed frame for it.

Twin Bed Dimensions

If you want to welcome a twin bed in your home, you should know that the minimum recommended room size is ten feet by seven feet. This is the smallest, but the most common standard-sized bed you can find in the market, and it’s 38 inches wide and 75 inches long.

Besides children, this bed is a good option for those who live in tight quarters or have to share the room with a sibling or a roommate. People often find them suitable for guest rooms, dorm rooms, and bunk beds.

Twin XL Bed Dimensions

Five inches longer than the regular twin mattress is the twin XL bed, which is the number one choice for taller children or regular size individuals. It is an 80 inches long and 38 inches wide sleeping surface that represents the standard college room bed.

It is an economical solution and the best choice when you are looking for a transitional or temporary sleeping option. But once the circumstance changes, adults tend to change it for something more spacious and comfortable. Students, teenagers, or your guests will, however, be more than happy to spend the night on it.

Full Bed Dimensions

If you are looking for a single mattress that can fit almost every room, you should definitely choose the full-size bed. It is 54 inches wide and 75 inches long, which means that it will give you quite enough space to sleep comfortably.

Many couples who live in a small apartment use it as well, which can be okay, but under the conditions that both people are calm and steady sleepers. In case you are wondering whether to invest in this sleeping surface or not, bear in mind that you can use it for your child later on, or as a guest bed option when you decide it is time to get more comfortable.

Full XL Bed Dimensions

If you or your partner are a bit taller, or if you would like to have some extra space, you should consider buying a full XL mattress instead of the regular full version.

This one is five inches bigger in length, and it needs a bit more space in your room for that additional leg space. It is 54 inches wide and 80 inches long.

It is a good choice for teenagers and adult individuals who like having more space in their bedroom. It can be an option for couples, but mostly just temporary, given that it doesn’t have that much space for two regular persons.

Queen Bed Dimensions

The queen bed is an often choice for both couples and single persons who like having a spacious sleeping surface. We are talking about the most popular bed size you will never outgrow. It is 80 inches tall and 60 inches wide, so there is enough space for every individual to sleep comfortably if you are with a partner, or more than enough space for you to sprawl out while sleeping alone. It fits most of the bedrooms, and given queen beds are so popular, you can find great versatility in the domain of beddings and bed accessories.

Olympic Queen Bed Dimensions

This is not a standard bed size since it’s six inches wider than the regular queen, and because of that, it has its benefits, but also downsides. Thanks to that additional width, it is a much more comfortable sleeping space you will love having in your bedroom, but you may find it hard to find and match it with adequate sheets or other bedding pieces.

It is 80 inches tall and 66 inches wide, and it is made for camper trailers and RVs, as well as for mobile homes. People who don’t have room for a king bed often decide on having an Olympic queen.

King Bed Dimensions

If you would like to welcome a king bed in your home minimum room size must be 12 feet by 12 feet. This is the widest bed in the market since it is 80 inches tall and 76 inches wide, and most people are dreaming about having this type of sleeping surface.

It is so big that two individuals who are sleeping in it will have enough private space to feel extremely comfortable. The king-size bed is a luxurious sleeping solution for master bedrooms. Even in case you have children or pets who like sleeping with you and your spouse, you will still be very comfortable.

California King Bed Dimensions

The California king is the longest bed you can find, it is 84 inches tall, four inches longer than the standard king, but it is four inches narrower. It is made for extremely tall people who need some extra space for legs in order for them not to hang over the edge, and it is comfortable enough for couples and families who like to spend time in bed together.

If you decide this is the best solution for you, just make sure you have enough space in your bedroom – 12×12 feet.

Other Mattress Size Factors

We already mentioned that besides choosing the right type and size of the mattress, there are other things that can and should affect your decision. You need to take into consideration things like the budget, the size of the room this bed is going to end up, for example, and to have that particular person who you are buying this sleeping surface for on your mind.

Who is the mattress for

In order to choose an adequate mattress, you need to know exactly who is going to sleep on it. If you want to buy a new bed for you and your partner, and you know kids will end up there with you quite often, you should consider purchasing a king or California king. If, however, there are just two of you, the queen will be enough, especially if you two like sleeping close to each other.

On the other hand, if you are alone and you like to sprawl out, the queen is the perfect match for you. But pretty often people don’t have that much space in their bedrooms, so a full and full XL mattress will do the work just fine.


The amount of money you can put aside for this item is definitely a crucial matter that will dictate your choice. There are many options you can choose from, regarding the size of the mattresses, but also the brand that’s making them, the materials they are made of, the additional accessories that come with the purchase, and so on. It would be good to go through some reviews and to be realistic about what you can get for a specific budget.

Size of the room

It really doesn’t matter if you have enough money to buy a California king mattress if you don’t have enough space in your bedroom for a bed of that size. People often make a mistake forgetting that this room needs to accommodate more than just a bed.

There are other objects and pieces of furniture that need to fit there too, like a cupboard and dresser with drawers, but also, you have to have some space around your bed to maneuver. So be smart and measure the room before you make a purchase, and bear in mind everything we just said. You don’t want to stay trapped in there with nothing but a bed and no room to access it correctly.


What size of bed is best for couples?

That’s definitely the standard king bed. It will provide enough space for both individuals and allow them to enjoy comfortable, spacious surroundings while they sleep or stretch, but also, it is an excellent surface for sexual activities, given that they will have a huge surface to maneuver. 

Are double beds the same as full-size mattresses?

Yes, when people say double, they actually mean a full-size bed. This type of mattress is 75 inches long and 54 inches wide, and the name double comes from a belief that this bed is twice the size of a twin, even though that’s not true because it’s only 15 inches wider.

Are there bigger beds than California king?

California king is the biggest standard bed size, but there are some other oversized beds like Wyoming king, Texas king, and Alaskan king. These beds are much larger than the king or California king bed, and they are very hard to find on the market.


As you can see, choosing the right bed size is not that easy, you have to take many things into consideration. You probably thought picking the right type will be the only difficult thing, but you were wrong. Now, one last tip before we part ways.

We forgot to mention that it’s necessary to measure the bed frame you already have before purchasing the mattress, because you don’t want for it to be larger than the foundation, and to think about whether this is the permanent or just temporary solution.

In case you are buying a transitional bed, you should choose the smaller and less expensive one you can later use for a guest room, for example. Now that you know all of this, go and browse through mattress pages and see what they have to offer.