Bunk Bed Mattress Size: A Complete Guide


Bunk Bed Mattress Size

You usually find bunk beds in summer camps or dorms and hostels. Four poles or pillars support a bunk bed. You climb a ladder to move to the upper bunk.

Railings enclose the upper part. The railing protects sleepers against falling off the bed.

What size is the bunk bed mattress?

A bunk bed frame rests on another one. It allows for more than a bed to occupy floor space.

Using a bunk bed helps to economize space. You can find bunk beds on ships, in hostels, and in dormitories.

Bunk bed mattresses today are designed for individual bed styles.

Bunk bed mattress come in the following sizes:

  • Full size (54 inches by 75 inches)
  • Twin size (38 inches by 75 inches)
  • Twin XL size (38 inches by 80 inches)

You need to find out the mattress size first. Then, you can go ahead to make a purchase.

Typically, most bunk beds come with guard rails. Guard rails prevent sleepers from falling off. So, it is better to get a mattress that is 9 inches thick or less.

Types Of Bunk Beds

The most popular is the standard bunk bed. It consists of two beds of the same size. One stack over the other. Specific models come with privacy curtains. The privacy curtain is useful for the lower bunk.

Next is the twin over full bunk bed. Its arrangement is similar to the standard bunk bed. However, the upper is a twin size. The lower is full size.

Another is the full over full bunk bed. One can refer to it as the wider bed. However, its upper and lower beds are of the same size. Both have a double bed. As such, it can accommodate four people at a time.

There is also a futon bunk. Its layout is like the standard bunk. Its lower bunk converts into a bed instead of a standard mattress. Futon bunks can help save space in smaller rooms. Its lower bunk is convertible to a couch. It could function as a sofa during the day.

The loft bed contains a top bunk only. The area underneath can then be useful for other purposes. This space could house some drawers. It can also convert into a work area. Typically, loft beds help to conserve space. It could be more expensive due to its features.

The triple loft bed houses a total of three bunks. Each bunk is different from the others. Therefore, it combines different bed types in one. Also, its upper bunks may have rails.

Bunk Bed Mattresses

Mattresses usually conform to bed sizes. The bed size standards vary from one country to another. The dimensions of its proportions are in height, width, and depth. In most nations, the standard sizes are three. They are King, Queen, and Double. These sizes are not in numbers but in names.

Searching for the best bunk bed mattress could be daunting. In the past, bunk beds appeared simple and were uniform. Nowadays, they come in diverse shapes and sizes. Also, their heights, weights, layouts, and features vary. For starters, a bunk bed mattress must be comfortable. It must be safe and durable too.

Factors To Consider In Choosing A Bunk Bed Mattress

First on the list is fitting. Your choice bunk bed mattress should fit into the bed’s design. You would need to consider the type of bunk bed needed. You need to take note of the sleeper.

Your budget is another factor. Also, look into the safety features.

Size considerations

The choice of your bunk bed mattress depends on your bed’s design. Double-check the bed size before buying a suitable mattress. Your current bed is probably a twin or full size. Mostly, bunk beds need two twin mattresses.

You can as well get a twin – over – full design. Otherwise, you can choose a twin XL. The twin XL is lengthier than ordinary twins.

If you do not have a bunk bed yet, consider the design first. Then, work on the perfect design for your needs. If you wish to economize on space, the loft comes in handy. The standard bunk will accommodate more than a child. The triple also has more sleeping area for children.

If in need of space, you may consider the L – shape. It can accommodate two beds. Besides, it offers space under the top bunk.

The thickness of the mattress

Another vital point to consider is the mattress’ thickness. You may overlook this when using regular bunk beds. However, bunks have limits. You also need to look out for some safety precautions. Typically, a thin mattress is ideal for the bunk bed. A mattress that is 6 or 7 inches thick is a top choice.

A mattress that is too thick may cover the rails. Using a thick mattress renders the guard rails useless. There must be space between the mattress’ top and the guard rail. This space should be about 5 inches. However, it depends on the bed’s design. Estimate the measurement of the bed to get the best fit.

For bottom bunks, you may not be cautious about thickness. However, a thicker mattress gives less headroom. You might consider a thinner mattress for the bottom bed too. Note that a child would need space to sit up.

Also, a thinner mattress protects sleepers. It ensures they don’t hit their heads when sitting up in bed. Besides, narrower mattresses are lighter. Changing the sheets is, therefore, less stressful.

Cover design and material

Cheaper bunk beds are usually simple in design. You need to consider this, especially when shopping for children. For children, covers with zippable designs are welcome. Also, check out for designs that are easy to wash. Covers with removable designs are suitable for children’s use too.


We tend to rate mattresses based on firmness between 1 and 10. On the scale, one is considered the softest. The hardest on the scale is 10. Many sleepers fancy a medium-firm mattress. The medium-firm mattress rates between 5 and 7. The rating is because the medium-firm bed is more comfortable.

Materials of medium or soft designs are preferable for children. Children who are older and heavier can use firmer materials. You may need to visit the store with the sleepers. Allow them to lie on a couple so they can make their choice. The action saves you a whole lot of trouble.

Weight and body build

Diverse body frameworks need different mattress features. Children usually prefer softer mattresses. They prefer these because they mostly weigh lesser than 130 pounds. Softer mattresses conform better to their body frame. Heavier individuals prefer generally firmer mattresses.

Note also that hybrids and latex foams are more massive. The innerspring and foam mattresses are lighter. The weight limitation on the top bunk is lighter too.

Sleeping posture

The mattress’s function is to keep the spine’s alignment. Choosing a mattress is, therefore, dependent on a sleeper’s position. People who sleep on their backs prefer the medium-firm mattress. The bed offers support to the spine in this position.

For side sleepers, the softer mattress is a great choice. Side sleepers tend to feel pressure at their hips and shoulders.

For stomach sleepers, the medium-firm or firm is ideal. The mattress keeps the spines perfectly aligned as they sleep.

Sleeping temperature

Our bodies enjoy sleeping in cool environments. Nonetheless, some individuals prefer to sleep hot. A child who tends to kick off covers probably needs something fresh. The memory foam mattress is notorious for trapping heat. The innerspring, however, allows for a more refreshing rest.

Types of mattresses

Mattresses generally are made of some materials. These are latex, innerspring, hybrid, and memory foam. The choice you make depends on the sleeper’s needs. There isn’t a set of unique rules to follow when making a choice. Whichever the sleeper wants will be ideal.

Movement and noise isolation

The best mattresses are those that isolate movement. These also work for bunk beds. These types of mattresses are suitable for more extensive beds. It is better to choose mattresses with lower responsiveness. Those with excellent motion isolation are also superb.

Also, mattresses that help to muffle noise are excellent. These help children to sleep soundly. It as well lessens disturbances from sleepers in other bunks.


Generally, prices for bunk bed mattresses are reasonable. Their prices are lower because they are smaller. They also offer less durability compared to others. It is less durable because sleepers tend to outgrow them quickly. Within five years, a child will probably need something more significant.

For the above reason, you might consider buying a value bunk. However, if you don’t mind spending extra, you can buy the luxury type.

How To Pick The Appropriate Bunk Bed Mattress

Before making a decision, you must have made some checks. First, know the cost involved. Also, find out the available types of bunk bed mattresses. You will as well consider the material and sleepers.

Once done, you can follow these guidelines. The first is to determine your bunk bed style. The style could be standard, L – shape, etc. Next, get a measurement of the sleeping space you have. Ensure that you have enough space to accommodate your pick.

Afterward, look into your budget. How much do you intend to spend on the mattress? Also, check if your bed requires more than one mattress. Besides, list out the vital considerations for your choice. Look into the profile, comfort, type, and firmness.

Then, go over the top-listed bunk beds in your local store. Try to see if any of them is suitable for your needs. Finally, you can confidently make your purchase.


Selecting a bunk bed mattress is quite an easy task to accomplish. However, if you do not consider certain factors, you may miss it. Always remember that there is a bunk bed mattress that suits your needs. All you have to do is ruminate on some factors, and you are good to go.

For the top bunk, you may consider a thin mattress. A thin mattress ensures that it does not cover the guard rails. Also, it should not exceed 7 inches.

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