Guide to Crib Mattress Height

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Not sure what height your crib mattress should be? Don’t worry, we’ve got you covered.

In this blog post, we’ll walk you through the different heights available and help you choose the right one for your little one.

We’ll also give you some tips on how to make sure your mattress is properly positioned in the crib

So whether you’re a first-time parent or a seasoned pro, read on for everything you need to know about choosing the perfect crib mattress height. Thanks for reading!

How high should a crib mattress be?

When deciding how high your baby’s crib mattress should be, safety is the most important consideration.

A good rule of thumb is that the top of the mattress should be no higher than two inches below the top edge of the side rail.

This allows you to easily reach in and take your child out without putting any strain on your back or shoulders. 

Additionally, if the mattress is too low, you run the risk of your baby climbing out and falling out to potentially injure themselves.

So make sure that when you set up a crib with a new mattress, it’s at just the right level!

When should I lower my crib mattress height?

Lowering your crib mattress height is an important indication of your baby’s developmental milestone.

As they begin to pull themselves up and try to stand, you’ll need to make sure that the mattress isn’t too high for your growing little one.

Generally, when babies are between four and five months old it’s time to lower their mattress so that they don’t hurt themselves. 

If your baby hasn’t started pulling up yet but you notice them trying to reach or stand, it may be a good idea to lower the mattress before they get injured while trying.

It’s always best to be ahead of the game when protecting your child!

Apart from lowering the mattress height, there are other safety measures you can take such as using bumpers so that there is no risk involved when you leave them in the crib for longer periods without supervision.

What depth should a baby mattress be?

When you’re searching for a baby mattress, the depth should be at least 5 inches thick.

Anything thicker tends to provide an even more comfortable sleep experience for newborns and infants.

It’s important to choose a mattress with adequate depth so that there’s plenty of support, and your baby won’t feel like they are sinking in. 

Additionally, experts agree that infant mattresses with 4 or fewer inches of thickness could increase the risk of suffocation or entrapment while your baby sleeping, which is why investing in a mattress with at least 5 inches of depth is essential.

What height should crib mattress be for 6 month old?

When your baby is 6 months old, it is important to ensure they have a safe sleep space. One of the most important elements in a safe sleep environment is the height of the crib mattress.

If a crib mattress is too low, your baby could roll out of the bed, and if it is too high they can become stuck between the bed and the railing. 

The general recommendation for a 6-month-old baby is to keep their mattress in its lowest setting.

That way, it will be easy for you to move your little one in and out of their him or her crib with ease, but still high enough that they or cannot escape from their protective cocoon.

Can you safely elevate crib mattress?

Crib mattress elevation can be a tricky thing. While it can help reduce the risk of SIDS, parents have to exercise caution and make sure that the bedding and crib are securely configured.

It’s important to remember nothing should ever be placed under the top sheet more than one inch deep as this could create a hazardous gap between the mattress and the bottom rail. 

If your child is choking or coughing, elevating their crib mattress may also help to reduce their discomfort and allow them to breathe more comfortably.

Ensuring that the elevation is stable and safe for the baby is crucial before making any adjustments.

When should I lower my crib to the lowest level?

When safely transitioning your baby from the crib to a toddler bed, there is no one-size-fits-all answer as to when you should lower the mattress in the crib.

Most experts agree that around 18 months-2 years old is a good age to make the transition.

At this point, your baby should already be able to climb out of the crib and pull themselves up on furniture or other objects. 

By lowering their mattress, you can give them more room to move around and make it easier for them to get in and out of their bed independently.

Of course, every child is different so be mindful of your baby’s development milestones before making the switch.

Ultimately, knowing when to lower their crib depends on both their cognitive and physical progress.


Choosing the right crib mattress for your baby is an important decision.

With the knowledge you’ve gained from this guide, you can make an informed decision on which mattress will provide your baby with the best comfort and safety.

Each manufacturer makes their mattresses differently, so be sure to read the labels carefully. Keeping your child’s security and health in mind is key when selecting a crib mattress. 

It’s essential to find one that offers the appropriate firmness level, as well as proper height levels for safety reasons.

Crib mattresses must fit snugly into the crib to prevent entrapment of small objects that could potentially cause suffocation or strangulation risks.

We hope this guide has helped you search for a new crib mattress for your infant!

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Shane Douglas

Shane Douglas

After my second child was born I was set on finding the perfect crib mobile to give her that laughter that melts my heart :)
So now I just want to share my discoveries with you here.

About Me

After my second child was born I was set on finding the perfect crib mobile to give her that laughter that melts my heart :)
So now I just want to share my discoveries with you here.

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