While there are plenty of different types of kids' beds to choose from, bunk beds have remained a popular choice for the past few decades.

Not only do bunk beds provide a space-saving sleeping arrangement for smaller rooms, but they also add a touch of whimsy and fun! There's nothing like climbing up the stairs or ladder just before bedtime. Once you have chosen a bunk bed frame for your kid's room, it's time to find the perfect mattress to go along with it.

Working in the children's furniture industry means we have to pay special attention to safety. We make sure to do everything we can to manufacture the safest and most sturdy beds since we know the users can be, shall we say, "less than cautious" at times.

One important part of keeping kids safe in our bunks is informing parents about what to look for in a mattress. We often get asked about mattress sizes for our beds. In this article, we'll help you choose the best mattresses for bunk beds.

The Different Mattress Size Options

Generally speaking, a standard mattress will fit into a bunk or loft bed. Twin-sized bunks will take a twin mattress, etc.

We make beds in the following standard sizes:

  • Crib/Toddler: 28" X 52"
  • Twin: 39" X 75"
  • Twin XL: 39" X 80"
  • Full: 54" X 75"
  • Queen: 60" X 80"
  • King: 76" X 80"

The first thing you need to do when choosing a bunk bed mattress is to ensure you're buying the right size. If the mattress is too big, it won't fit within the bunk bed frame. If the mattress is too small, it may move around.

 

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Comparison chart of mattress sizes from crib to king with dimensions.

 

The Importance of Thickness When Buying a Bunk Bed Mattress

The main thing you need to look out for when purchasing a bunk bed mattress is the thickness. Mattresses of all sizes can range from 8-14 inches thick.

However, if you're going to be using it with a bunk bed, it's important to make sure that there's enough space between the top of the mattress and the top of the railing of the bunk. If the mattress goes higher than the frame, your child can roll off without being caught by the railing.

We always recommend using mattresses that are 8 or 9 inches thick on the top bunk, regardless of the size of the bed. Safety regulations require that there be at least 5 inches between the top of the mattress and the rail.

Keeping the mattress under 9 inches in thickness also allows you to change the sheets on your child's bed with much less effort. Our beds are designed to fit the mattress snuggly, so a very thick mattress will make bending the corner up to place a fitted sheet corner harder than it needs to be.

 

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What Size Mattress is Right for My Child?

The answer to this question is more of a judgment call. Just because your child is a toddler doesn't mean they must use a toddler-sized mattress. In fact, using a larger sized bed than the minimum size for your child's age will help make your bunk bed last longer and ensure they won't grow out of it in just a few years.

Twin-sized beds are often suitable for a child all the way up until they're ready to leave the home. However, if the room has floor space to spare, the bigger sizes always provide a bit more comfort.

We also have the option of creating a bunk using two different sizes. A popular option for different-sized bunks is a twin over a full-size mattress.

A child's bedroom with a pink loft bed, a desk underneath, plush toys, and a window showing a cityscape.

What Sized Mattresses Should Be Used for Trundle Beds?

A trundle bed is a low-wheeled bed that is often stored under the bottom bunk. Trundle beds are perfect for sleepovers as they offer an additional sleeping option without taking up any floor space during the day. So what size mattress is recommended for trundle beds?

For our trundle add-ons, you'll want to purchase a mattress with a maximum thickness of 5 inches. Since trundle beds rest on the floor, this is more about fit than safety. With the thinner mattress, the trundle bed slides under the bunk or loft frame easily.


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Choosing the Right Type

When it comes to bunk beds and loft beds, there are two main types of mattress options available, namely memory foam mattresses and innerspring mattresses. Let's explore both of these options so you can determine which one is the better choice for you.

Memory foam mattresses

Memory foam mattresses are considered to be one of the best mattresses on the market. They were originally developed by NASA when they were looking for a way to keep pilots comfortable during long flights.

Memory foam mattresses are made from hypoallergenic polyurethane foam, which contours to your child's body and provides maximum comfort. The foam density of these mattresses is what determines their softness.

Gel memory foam mattresses

Gel memory foam mattresses are one step up from regular foam mattresses. While they can be more expensive, the specialized gel foam will help your child stay cool while they sleep. A gel foam mattress is an ideal choice for those living in warmer climates.

Innerspring mattresses

Innerspring mattresses, also known as coil mattresses, are another popular option for bunk beds. There are plenty of different coil configurations to choose from, with firmer mattresses having a higher number of springs.

Before memory foam became popular, innerspring mattresses were the norm. However, these days, many people find coil mattresses uncomfortable.

FAQs

Do my bunk bed mattresses need mattress protectors?

It's always a good idea to use mattress protectors. Not only are they machine-washable, but they protect your mattress against spills and nighttime accidents.

Do bunk beds require a special mattress?

You can use a "normal" for your bunk beds. However, a low-profile mattress is recommended for safety purposes. You never want the mattress to sit higher than the guard rails. You should also always ensure you're purchasing the right size mattress.

How do you make a bunk bed more comfortable?

Some people complain that bunk beds aren't comfortable. However, if you invest in a memory foam mattress, the right bedding, and high-quality pillows, you can ensure a comfy sleeping experience.

As heat rises, you may find that sleeping in the top bunk can become quite warm, especially if you have low ceilings. If this is the case, you may want to install a ceiling fan or an air conditioning unit.

What about mattresses for loft beds?

The same advice that we've given regarding bunk bed mattresses can apply to loft beds. As loft beds are elevated, you don't want the mattress to sit higher than the guardrail. The mattress should also be the right size for the frame.

Should I get a freestanding bunk bed or a built-in bunk bed?

Here at Casa Kids, we make freestanding bunk beds over built-in bunk beds as they are easier to assemble and are not a permanent fixture in your home. As your kids' needs change, it is easy to reconfigure our bunk beds to suit different purposes.

Final Thoughts

Choosing the right mattress for bunk beds can make all the difference to your child's sleep quality, safety, and comfort. Remember to consider the size, thickness, and type before you make a purchase.

If you have any questions about our high-quality bunk beds and children's furniture, feel free to contact our team today.