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What Size is a Bunk Bed Mattress

Mattress Resources
Read Time: 7 minutes
  • Bunk bed mattresses come in various sizes, with twins being the most common. Other options include Twin XL, Full/Double, Full XL, Queen, and King, providing versatility for different needs and preferences.
  • The top bunk of a bunk bed requires a low-profile mattress, ideally around 6 inches thick, to ensure safety and prevent accidents. The mattress should be at least 5 inches shorter than the guardrails.
  • Consider the weight-carrying capacity of the bunk bed when selecting a mattress, especially for the top bunk. Choosing a lightweight mattress is crucial to avoid safety risks for both sleepers.
  • Bunk beds come in different types, such as standard, triple, trundle, L-shaped, and futon bunk beds, each offering unique features to cater to various space-saving and functional needs in different settings.

Bunk beds are a fantastic space-saving solution for small bedrooms, providing a fun and exciting option for sleepovers. However, choosing the right bunk bed mattress size can be a confusing task. This comprehensive article will discuss the different bunk bed mattress sizes available in the market, helping you make a well-informed decision that ensures comfort and safety for your bunk bed setup.

Understanding Bunk Bed Mattress Sizes

A bunk bed mattress size is not fixed and can depend on the specific design and manufacturer. While twin mattresses are the most common option for bunk beds, you can actually find bunk beds available in all standard bed sizes. To give you a clear picture, let’s take a look at the standard bunk bed mattress sizes in the following chart:

Mattress SizeDimensions (in inches)Dimensions (in centimeters)
Twin 38 x 7596 x 188
Twin XL38 x 8096 x 203
Full/Double54 x 75134 x 190
Full XL54 x 80137 x 203
Queen60 x 80152 x 203
King76 x 80193 x 203

Twin Bunk Bed Mattress Size

Twin bunk bed mattresses are the most common size available in the market. With dimensions of 38 inches by 75 inches, they are suitable for most twin bunk beds. Twin bunk beds are perfect for children, teenagers, and even shorter adults. While the sleeping space may not be ideal for side-by-side sleeping, the presence of two bunks allows for the comfortable accommodation of two sleepers.

Twin XL Bunk Bed Mattress Size

If you’re looking to accommodate taller individuals, a twin XL bunk bed mattress is a great option. With the same width as a standard twin mattress, which is 38 inches, the twin XL mattress provides an additional 5 inches in length, measuring 80 inches. This extra length can comfortably accommodate sleepers who are over 6 feet tall, making twin XL bunk beds ideal for growing teens or guest rooms.

Full/Double Bunk Bed Mattress Size

For those seeking a more spacious sleeping area, a full or double-bunk bed mattress is the way to go. A full mattress, measuring 54 inches by 75 inches, gives you plenty of space to stretch out comfortably when you sleep. Although a double mattress may not be suitable for two people, it can accommodate two sleepers during emergencies. Several bunk beds feature a full-size mattress on the lower bunk and a twin-size mattress on the upper bunk. This setup makes them great for sleepovers with friends and family.

Full XL Bunk Bed Mattress Size

The full XL size is the perfect choice if you’re looking for extra length in a full-sized bunk bed mattress. The full XL mattress is 54 inches by 80 inches, giving it an extra 5 inches in length compared to a regular full mattress. This makes it suitable for exceptionally tall sleepers who require extra legroom. However, it’s important to note that full XL mattresses are not designed for two people.

Queen Bunk Bed Mattress Size

A queen bunk bed mattress is an excellent choice for couples or families seeking a shared sleeping space. Measuring 60 inches by 80 inches, a queen-sized mattress offers generous space for two people to sleep comfortably. It’s not uncommon to encounter bunk beds featuring a queen mattress on the lower bunk and a twin or twin XL mattress on the upper bunk. Queen bunk beds are particularly popular for small families on vacations, as they offer a convenient and space-saving solution.

King Bunk Bed Mattress Size

For those who prioritize luxury and space, king-size bed mattresses are the largest option available in the market. It measures 76 inches by 80 inches, and a king-sized mattress provides ample space for a couple and their child to enjoy a comfortable night’s sleep. King bunk beds commonly incorporate a king mattress on the lower bunk and a twin mattress on the top bunk. These beds are perfect for families on vacation who want to maximize their sleeping space.

Types of Bunk Beds

Now that you better understand bunk bed mattress sizes let’s explore the different types of bunk beds available. Each type offers special features and benefits, catering to various needs and preferences.

Standard Bunk Beds

Standard bunk beds are the most traditional and widely recognized type of bunk bed. They feature one bunk directly above the other, with the lower bunk providing ample headroom. Some standard bunk beds may only have the upper bunk, creating additional storage space below the bed frame.

Triple Bunk Beds

As the name suggests, triple bunk beds feature three stacked on each other. These beds require a high ceiling to accommodate their height. In some cases, the middle bunk may be placed horizontally at a 90-degree angle, creating an interesting and space-saving configuration.

Triple Loft Bunk Beds

Triple loft bunk beds offer a unique design where the two top bunks face each other at a 90-degree angle. The bottom bunk is situated vertically below them, providing additional space for drawers and shelves. This configuration is perfect for those who require extra storage options in their bunk bed setup.

Shorty Bunk Beds

Shorty bunk beds are designed to be shorter and narrower than standard bunk beds, making them ideal for smaller bedrooms. However, it’s important to note that tall sleepers may find sleeping comfortably on these beds challenging. Shorty bunk beds are often used in children’s bedrooms, where space is limited.

Trundle Bunk Beds

Trundle bunk beds offer a versatile and convenient sleeping solution. These beds come with two standard bunk beds, with the bottom bunk featuring a drawer that slides out to form an additional bed. This configuration allows for easy accommodation of guests or sleepovers. The trundle bed can be raised to the same height as the bottom bunk, creating a seamless and unified sleeping surface.

L-Shaped Bunk Beds

L-shaped bunk beds feature two bunks connected to each other at a 90-degree angle, forming an L shape. This design maximizes the use of space by incorporating drawers and bookshelves into the bottom bunk. L-shaped bunk beds are particularly popular in modern-day apartments with limited space, offering a stylish and functional solution.

Futon Bunk Beds

Futon bunk beds consist of only the top bunk, with a futon in place of the bottom bunk. The futon can be folded up to serve as a couch during the day, providing a versatile and space-saving arrangement. This configuration is ideal for those who frequently host guests in their homes.

RV Bunk Beds

RV bunk beds are specifically designed for use inside recreational vehicles, campers, and motorhomes. These beds are similar to standard bunk beds, with the key difference being that they are built directly into the vehicles instead of being separate bed frames. RV bunk beds offer a practical and compact sleeping solution for those on the go.

How do you choose the right bunk bed mattress?

Now that you are familiar with the different bunk bed mattress sizes and types of bunk beds available, it’s essential to know how to choose the perfect mattress for your specific bunk bed. Consider the following factors when purchasing a bunk bed mattress:


When selecting a mattress for the top bunk, it is crucial to select a lightweight option. Placing a heavy mattress on the top bunk can pose a safety risk for both sleepers. Before purchasing a mattress, check the weight-carrying capacity of your bunk bed to ensure compatibility.


Opt for a low-profile mattress for the top bunk to maintain safety and prevent accidents. The ideal bunk bed mattress thickness is around 8 inches, ensuring that it does not exceed the height of the guardrails. A mattress that is too high can pose a safety risk, particularly for children.

Quiet Mattress

Consider choosing a foam mattress to minimize noise transfer between sleepers. Foam mattresses absorb motion and minimize disturbance caused by the movement of the other sleeper. This can mostly improve the quality of your sleep, especially if you are sharing a bunk bed with a restless sleeper.

FAQs about What Size Is a Bunk Bed Mattress

Are bunk beds a good idea?

Bunk beds are a fantastic option for saving space, especially if you live in a small home or have a compact bedroom. They’re great for accommodating two or more people in the area of a single bed, particularly if your room has high ceilings. Some bunk beds even come with storage compartments, allowing you to make the most of your space.

They’re suitable for various settings like guest rooms, kids’ rooms, vacation homes, and cabins. Despite being commonly associated with children’s rooms or dormitories, bunk beds are also available in sizes suitable for single adults and couples.

How much space is needed for bunk beds?

When considering bunk beds, it’s important to focus on ceiling height rather than floor space. You’ll need around 30 to 36 inches of space between the top mattress of the bunk bed and the ceiling. This means your ceilings should ideally be at least 100 inches high or 8 feet 4 inches.

What thickness should bunk bed mattresses have?

Using a low-profile mattress, ideally no more than 6 inches thick, is crucial for the top bunk. Safety guidelines recommend that the top mattress should be at least 5 inches shorter than the guardrails of the bunk bed. Thicker mattresses on the top bunk could pose safety risks unless you have extra-tall guardrails.

There’s no specific thickness requirement for the bottom bunk, but it’s essential to consider the sleeper’s headroom between the mattress and the top bunk. Typically, bottom bunk mattresses range between 8 to 10 inches thick.

Avoid using thick box springs as support for bunk bed mattresses. Instead, opt for bunkie boards designed specifically to support these mattresses. If your mattress needs more support than a thin board provides, it might not be suitable for a bunk bed frame.

Can bunk bed mattresses be used on regular beds?

You can use bunk bed mattresses on regular bed frames if they match in size. For instance, they’ll work fine together if you have a twin bunk bed mattress and a twin bed frame. Transferring them to another bed frame is easy since bunk bed mattresses come in standard sizes.

Bunk bed mattresses are usually thinner than regular ones to make sure there’s enough space above and not exceed the bunk’s weight limit. Regular mattresses are thicker for comfort but might be too thick for bunk beds.

Do bunk beds require special mattresses?

No, as long as the mattresses fit the recommended thickness, you can use any type you prefer! There’s a variety to choose from, such as innerspring, hybrid, latex, or memory foam mattresses. Foam mattresses offer more cushioning for pressure points, while coil mattresses provide better breathability.


Choosing the right bunk bed mattress size is vital for ensuring a comfortable and safe sleeping experience. By understanding the various bunk bed mattress dimensions and types of bunk beds available, you can make a well-informed decision that meets your specific needs and preferences. Consider factors such as weight, height, and noise level when selecting a bed for your bunk bed setup. With the right mattress, you can maximize the functionality and enjoyment of your bunk bed while providing a cozy and inviting sleeping space for yourself or your guests.

Christine Lapp is a full-time graduate student and part-time freelancer for Sleep Junkie. Since she was a little girl on the soccer field, Christine has had a love for sports, and she believes everybody should get up and get moving once a day. Now, she incorporates her love for exercise into her studies, pursuing a degree in exercise physiology. Christine understands that what you do during your waking hours has a direct impact on your night’s sleep. In our better sleep guides, she offers advice for developing healthy daytime habits to nurture a more peaceful slumber.

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