What size is a crib mattress?


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A baby spends 14 to 18 hours a day in the crib. So, it’s pretty natural that you want to make the right choice when choosing the crib mattress as a parent. While other factors, such as quality and foam and Comfort also play a vital role in this regard. The first step is to select the correct crib mattress size.

We will take you through all the different sizes of crib mattresses available in the market so that you can make the best choice for your little one. Just read ahead to know more and more. Crib mattresses are the one which fits a standard-sized baby crib. If u have more budget spare then u can buy a crib mattress for your babies so that they can sleep safe and sound. There are many advantages of the crib mattress during the first few months of life, your baby will spend more time asleep than awake. Part of getting your sweet little one to sleep soundly and comfortable is creating a good sleeping environment, and a safe, comfortable crib mattress is a great plan.

Different sizes:

Standard crib mattress size: 27 inches by 51 inches,
Mini crib size:24 inches by 38 inches.

Q; What size is a crib mattress?

length : The crib mattress measures about 28 inches by 52 inches.
Thickness: 4 to 6 inches

Q; What is Crib-mattress

A crib mattress fits a standard-sized baby crib.
What are the types of crib mattresses?
There are two different types of crib mattresses:
1. foam cribs
2. innerspring cribs: Both types—if they’re of good quality—l keep their shape well and provide excellent support and comfort to your infants and toddler
3. shaped cribs

1. Foam:

These mattresses are usually made up of polyurethane. Foam mattresses can be a good choice because they’re lightweight and durable, and are also usually the least-expensive mattress option.
When choosing a foam crib mattress, you want to make sure it’s resilient. Test this by pressing your hand on the mattress and seeing how long the surface takes to regain its shape (the faster, the better).

2. Innerspring:

With an innerspring mattress, the number of layers, from which material it is made, and the quality of the coverings add to the price and the comfort thee The Sealy Perfect Rest mattress, shown here (about $80) has a vinyl cover you can wipe and clean with a damp cloth. It also has border rods for strength (see Features) and weighs 12 pounds. The Simmons Kids Pampering Sleep Supreme 234-coil baby crib and toddler mattress, about $150, also has a vinyl cover. The two sides of this mattress are different(a feature you’ll see in other models); a firmer “baby” side is covered in foam, while the toddler side takes advantage of innerspring coils.

3. Shaped cribs:

The standard shapes are round, hexagonal, or oval. One of the reasons your parents may choose shaped cribs is that it is unique and adds fanciness to the room. The sizes for the shaped cribs are not regulated and therefore differ from one brand to another. The crib and the mattress are also sold together and they are customized too and they are slightly expensive.

Q; How to choose the right crib mattress?

Once you have picked out the best crib for your baby, all that’s left to do is to choose the right and most comfortable mattress for your baby. This may seem easy, but there are a few things to keep in mind when you shop. The first thing is there are different mattress sizes.

The first thing is safety:

You want to be sure that the mattress fits inside the crib snugly with as little space possible between the two. A large gap can pose a safety risk for your baby. As a rule, when the mattress is inside the crib, you should not fit more than two fingers between it and the crib frame. Standard cribs are significantly larger than mini cribs. According to the American Academy of Paediatrics, a crib mattress should be firm enough that it doesn’t conform to the shape of your baby’s head.

Keep the crib empty:

Although they look nice, pillows, bumpers, stuffed animals and blankets should not be in the baby’s crib. That’s because they can write around your baby’s face and be a suffocation hazard. The sheaths should be fitted only and check the American School of paediatrics safe sleep policies for more information.


1. The biggest advantage of a regular crib is that your child will get several years of use out of their baby bed.
2. It is very comfortable for babies.
3. Many standard cribs can be converted into toddler beds, so you won’t need to buy a new bed once your child discovers how to escape from their crib. But if you decide to switch things up and buy your little one a fun toddler bed, you can purchase a toddler bed frame and use the same standard crib mattress


It is concluded that the size of a crib mattress is 28 inches by 52 inches. and the thickness is 4 to 6 inches. To help prevent Sudden Infant Death Syndrome (SIDS) and suffocation, it is important to pick a foam crib mattress that is designed for infants and toddlers. It should be firmer, softer and safer.

Frequently Asked Questions:

Q. What to look for when buying a crib mattress?

Buy a new one:

make sure not to buy a second hand. There are many reasons for this 1. Old or worn mattresses – especially those with foam or padding – can be a nidus for bacteria that may impact your baby’s health. Older mattresses will not be as firm, either, making it an unsafe sleep environment for new babies and it may be a cause of frequent backaches.


The legal size for a crib mattress – which is set by the CPSC – is 27.25″ x 51.25″ inches, with a thickness up to 6 inches. You want to make sure your mattress fits your crib perfectly and snugly. Per CPSC guidelines, make sure gaps should not be larger than two fingers between the sides of the crib and the mattress. A more accurate measurement is no more than a 1″ gap. Gaps create spaces for a newborn’s head to get trapped.


Foam mattresses weigh around seven to eight pounds but can weigh 20 pounds as polyurethane foam can be heavier. Innerspring mattresses with coils will be heavier, up to 15 to 30 pounds.


Consider a breathable waterproof or eco-friendly (waterproof) cotton cover for the mattress, to protect it from dangerous accidents and spills. Removable covers make it easy to take off and frequently wash when getting dirty. Make sure it fits snugly and goes underneath the crib sheet, which will stop it from different suffocation hazards.


You want to purchase a mattress and mattress cover that will promote airflow and allow your baby to breathe easily, especially when they roll over onto their stomachs. Look for specially constructed vents on the side of the mattress to keep air flowing and ventilated.

2-Stage crib mattresses

You may see some mattresses marketed as “2-Stage” crib mattresses. This means the mattress is double-sided and can be flipped over during different stages of your child’s development. One side of the mattress is firmer for younger infants and the other is softer and comfortable for toddlers. Always consult with your paediatrician before deciding which side is good for your child. There should be a label at the end of the mattress to tell you which side is which.

Warranties issues

Some mattresses offer warranties for more than one ear, seven years, or even a lifetime. Don’t be fooled by a long warranty, and don’t pay extra for a mattress with a warranty. “Warranties are mostly a marketing tool to make the consumer spend more.

Why does the cheapest mattress tear easily?

The cheapest foam and innerspring mattresses have thin vinyl coverings and edgings that can tear, crack and dry out with time-resistant, reinforced double or triple laminates, or very fine organic cotton and comfort level also increases An innerspring mattress that has better-gauge steel and better-quality cushioning will weigh more. The same is for a foam mattress that’s made of denser, better-quality foam.

Q; How firm should a crib mattress be?

A; How firm should my baby’s crib mattress be?
The Consumer Product Safety Commission (CPSC) recommends that a baby mattress be firm and flat but soft. Furthermore, the mattress should be tight-fitting and smooth and properly installed so there is no chance that your baby is getting trapped between the mattress and the crib. Extra space on any side is dangerous and it can cause suffocation when the baby is trapped.

Q:Which mattress is best for a newborn?

Ans: To help prevent Sudden Infant Death Syndrome (SIDS) and suffocation, it is important to pick a foam crib mattress that is designed for infants and toddlers. It should be firmer and softer. The American Academy of Paediatrics (AAP) recommends avoiding memory foam crib mattresses. it should be between an eight and a 10 on the mattress firmness scale.

Q:What is the Price of a standard crib mattress?

And: The price of the mattress is approximately $150. However, it can be low or high depending on the quality and the inclusion of other features, such as waterproof covers and shape.

Q: Are All the crib mattresses equal in size?

Ans: Not every mattress has its dimensions depending upon its company.

Q:Do toddler beds and crib mattresses have the same size?

Ans: yes both are of the same size.

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By Muhammad Asim