Why Mattress Doesn’t Fit Bed Frame?

So you’ve purchased a mattress but it doesn’t fit your bed frame? It’s indeed a big problem because now you’re stuck with your mattress.

So, why the mattress doesn’t fit bed frame?

Well, the mattress couldn’t fit in the bed for many reasons. Perhaps you got the measurement wrong. Or the mattress is perfect in length but not in width. Whatever the case is, if the mattress doesn’t fit the bed frame, it’s a big issue.

mattress doesn’t fit bed frame

Well, what can you do about it?

If the mattress is short, you can try to fix the gap between it and the bed frame. Moreover, you can also apply some easy fixes that’ll be shown in this article.

Besides, you can use a mattress extender to fix this issue as well. You’re in luck as we’ve covered everything you need to know in this article. Furthermore, we’ve tried to show you how you can build a mattress extender too.

So, let’s get right into it, shall we?

The Problems

There are two types of problems that may arise when your mattressdoesn’t fit the frame of the bed. One of them is that the mattress is too small and the other is that the mattress is too large.

Problems When the Mattress is Too Small:

So, if you’ve purchased a small mattress than the bed frame, it’ll show the following problems:

●     Gaps on the Bed

Well, it’s a no-brainer that your bed will have gaps at the front and the back when you’ll have a small mattress. Moreover, the gaps won’t look pleasant and you’ll be left with no choice than hiding it.

●     Discomfort

Normally when gaps occur in the bed due to the small mattresses, people try to hide it with pillows. Also, people use blankets over the areas that have a gap.

As a result, these areas don’t look and feel pleasing at all. And, if you’re trying to sleep in those areas, you won’t feel comfortable at all.

●     Risk of Any Injury

At times, if you have a toddler or pet roaming around the house then they can get injured in the bed. The beds that have gaps in them due to the small mattress are often vulnerable to many injuries.

But, how may you ask?

Well, your toddlers or pets can get hurt while climbing on the bed. Hence, it’s not so ideal to have gaps in your bed, is it?

Problems When the Mattress is Too Big

At times, you’ve provided the right measurement but the company has still sent a big mattress. Let’s see what problems large or big mattresses cause:

●     Unwanted Fit

At times, people force the mattresses into their bed frame. As a result, it doesn’t look good and the bed looks unorganized.

By forcing the mattresses on the bed frame, they feel uncomfortable at the time of sleeping.

●     Health Problems

Yes, you heard me right. Haven’t you heard that good sleep contributes to good health? Well, if you’re not able to sleep properly, it’ll affect your health.

Moreover, long mattresses can cause different health problems. Amongst these health problems back pain, rib pain, and many more happen really often. It can also disrupt sleep and that’ll cause you to feel tired the following day.

●     Unorganized Look for the Room

Whenever people purchase a mattress, they try to match it with their décor. In fact, a mattress can enhance the décor of your room as well. But, if your mattress sizes don’t match, they’ll hang to the sides.

As a result, it’ll give off an unorganized look for the room. Hence, it’s essential that you fix the issue.

The Fixes

Yes, we’ll go straight into the fixes without wasting any of your time. But, before compiling the fixes for this problem, we need you to know some things.

There are different approaches to fixing this problem. Either you can use some tricks to compensate for this problem or you can replace the mattress.

Most of the time, replacing or returning a mattress isn’t the ideal option. This is mainly because it’ll cost you extra money. And if you just purchased the mattress, it’ll add up even more.

So, it’s not an ideal situation to be in, is it? But don’t worry, we’ve got your back. Let’s look at some of the things at groundinsider.com, These guides can do to fix this issue.

Method 1: Fixing the Gaps

It’s essential that you fix the gaps in your bed. Every year a lot of kids and adults get minor injuries from these gaps. Hence, you’ll need to work on those. Well, it’s easy and it shouldn’t take much time. Let’s go:


Let’s look at the tools for the job:

  • Drill
  • 2-3 inch thick boards
  • Screw
  • Foam

Step 1: Check the Mattress

Firstly, check the mattress of your bed. If the mattress has any mismatches in the size, they’ll have a gap. Mainly, the mismatch in size causes gaps to occur so keep that in mind when ordering a mattress.

How should a mattress fit on a bed frame?

A mattress should be of an exact fit in your bed frame. This means that it shouldn’t be large or small. It’ll have no gaps and the mattress should never hang off the sides of the bed as well.

Step 2: Block Any Gap

If you don’t want to buy a new mattress for yourself, you can block the gaps or try to fill them.

But, how to fill gap between mattress and bed frame?

Screw-in 2-3 inch thick boards in the headboard at the top of the mattress. This will fill in much space for you. However, the number of boards that you build will depend on how big of a gap you have in your bed.

On the other hand, you can push the mattress to the top and install gap boards on the footboard as well. Whatever the case is, just try to fill in the gaps without using any pillows.

Step 3: Add Padding in the Headboard

If you want to fix the gaps in the bed but also try to enhance the décor of your room, try padding. What I mean is, add padding in the front of the headboard.

But, how will you add padding?

Well, add in the padding in the form of foams. As a result, the gaps will fill easily. Moreover, this will also keep the pillows from not moving. Furthermore, it’ll provide a new life to the old headboard.

However, make sure that your children or others are aware of the gap in that place. This is because you’re not hiding the gap in the place and filling the gap. If someone steps or falls on that place, they can hurt themselves in the process.

Step 4: Remove the Headboard

Remove the headboard if the mattress doesn’t fit properly. Hence, you’ll be able to increase the space in your bed frame. So, tossing the headboard will mean that you’re increasing the space in your bed frame.

Also, after removing the headboard, push the bed to the wall. If you want, you can even install a folding screen as a replacement for the headboard.

Method 2: Creating a Mattress Extender

So, what’s a mattress extender? Well, a mattress extender can make mattress wider. You can use it for your bed frame if the mattress doesn’t fit properly in it.

Also, you can purchase this online. But, it’ll add up to the cost of the mattress as well. And, if you’ve just bought the mattress, you won’t want to spend some more money behind an extender.

Don’t worry, we’ve got your back. We’ll help you create a mattress extender with the steps below. In fact, the process is really easy and isn’t time-consuming at all. If you can follow all of them correctly, you’ll get it done. Let’s begin:


Yes, you’ll need a set of tools for the job. Let’s take a look:

  • Old Mattress
  • Cotton/Vinyl cover
  • Measuring tape
  • Notebook
  • Wood
  • Electric Knife

Step 1: Measure the Excess Sides

Firstly, measure all the sides that are hanging on the sides. Take your measuring tape and note those down in a notebook. The excess measurement will show how much longer the mattress extender needs to be.

You’ll need to hold a block of wood at the back of the bed frame to take dimensions. But, what does a cord of wood look like?

Well, a cord of wood is a stack of wood that is 4 feet tall. But, in this case, a block of wood will do just fine.

Step 2: Cut the Mattress & Sew It Together

Cut the old mattress with the correct measurements. Use an electric knife for this tool. After you cut the block, cover the place with a cotton cloth. In the end, you can also seal the cloth together with the mattress extender.

Why does Mattress Get Delivered Short?

Well, you’ve informed the manufacturers about the correct measurements. Then why did they provide short mattresses?

As this is a common problem throughout the world, we tried to share some factors that could happen. Here are the causes that could happen:

  • The size that was provided wasn’t feasible when the prototype finished. As a result, the manufacturers failed to provide the exact measurements.
  • Manufacturers try to avoid shipping larger products and they reduce the measurements accordingly.
  • Manufacturers try to keep their boxes small and reduce the size of mattresses.
  • Many people mess up the mattress size chart and order the wrong size.

Wrapping Up

That’s all we have for you. Hopefully, we cleared why the mattress doesn’t fit bed frame.

In the end, we’d like to say that always check the mattress size comparison before ordering one.

And if you don’t get the right size of the mattress, follow our fixes in this article. Good Luck.