There are a number of options on the market, from waterproof, decorated, smaller (crib only), larger (mini bed) models, to anti-reflux mattresses designed to avoid the risk of your baby drowning when regurgitating.

So if you are thinking of buying a mattress for your baby’s crib, you have come to the right place! Today we will talk about the advantages and disadvantages of this product, what are the best models on the market, where to buy and how much to pay.

First, the most important

  • Crib mattresses may have traditional dimensions or be American style, wider and slightly higher. Stay tuned for this information to buy a mattress that is the exact size of the crib or mini bed.
  • Some crib mattress models have one of the highest ends to prevent the baby from refluxing. If you prefer a conventional model you can reproduce this feature using an anti-reflective pillow.
  • The price of a crib mattress varies because of size, foam density and brand, usually costing $ 150 to $ 200.

Buying Guide

Just as important as assembling the baby’s room is choosing the right mattress to accommodate the little ones. They may have different foams that alter the quality of the product.

Therefore, throughout this Buying Guide we want to guide you in this choice. That way, by the end of this article, you’ll know how to choose the best crib mattress for your baby.

Image of sleeping baby face down in crib, crates in the foreground and baby in the background.

The quality of the mattress is critical to your baby’s health. 

What is a crib mattress and where to use it?

The crib is where the baby will spend most of the time, especially in the early months of life, when he can sleep up to 20 hours a day. For this reason, it is essential that you choose a good mattress to ensure the health and comfort of your baby.

Mattresses are fundamental for child development, especially in the orthopedic aspect. The body should be aligned and no part should be raised, that is, you should not put pillows for babies up to one year, otherwise the child will have growth problems that will only be noticed when she is older.

When the child feels discomfort on the crib mattress, she often cries whenever she is put to sleep.

To choose the ideal mattress for your baby you should check the material, dimensions (height, width and length) and density. Mattress material should always be foam, never spring, as this option is not compatible with the bone structure of babies.

Density varies by weight, for children up to three years old a D18 mattress is suitable (can handle up to 40 kg), after three it is good to exchange the mattress for a D23 model. He must be neither soft nor hard, but firm.

The mattress should not sink and cannot be deformed, at any sign of these two characteristics it must be replaced. All parts of the baby’s body must receive the same pressure, ie the head, trunk and legs should always be the same on the mattress.

Image of a sleeping baby.

Until they are one year old, babies should not sleep with a pillow.

It is recommended to turn the mattress once a month to maintain firmness and durability, but be aware that some models have different sides. In most cases, only one side of the mattress comes with a waterproof layer.

If the mattress you want has only one waterproof side, you can opt for a waterproof cover that sits underneath the cover and does not come into contact with the baby’s skin.

Another feature of the crib mattress is the treatments given to the fabric to make it antiallergic, anti-mite and antifungal, protecting the respiratory health of your baby.

Some models are also anti-reflux, which reduces the risk of regurgitation accidents. If you don’t want to buy such a mattress, just purchase an anti-reflux pillow.

Regarding the dimensions, they vary between national and American standards. The national model is slightly smaller: it is 130 cm long, 60 cm wide and 10 cm high, while the American type is 130 cm long but is 10 cm wider (70 cm) and 12 cm high.

Here’s a list of the advantages and disadvantages of crib mattresses, an essential item in your baby’s room.


  • There are two choices of mattresses according to dimensions: national and american model
  • There are waterproof mattresses, but usually, only one side has this advantage.
  • 18 Density Mattress Can Be Used For Children Up To 40kg
  • Some mattresses fit in a crib and mini-bed


  • Pay attention to crib size to buy the right mattress
  • When only one side is waterproof, you cannot turn the mattress over
  • The mattress should be changed around three years old

What differentiates one crib mattress from another?

The main difference between the mattresses is the size, the American model is larger and can be used in the crib and mini-bed, while the national standard is slightly smaller, so it has the shortest service life.

Regardless of your choice, you need to be aware of the dimensions of the crib before purchasing the mattress, as it must be the exact size of the furniture, no more than two inches of clearance, to prevent the child from trapping his or her hands or arms in these gaps.

Below is a table with the main differences between the national and American standard crib and mattress:

National StandardAmerican Standard
SizeIt is 130 cm long, 60 cm wide and 10 cm highIt is 130 cm long, 70 cm wide and 12 cm high
Internal spaceSmaller, ideal for newborn babiesLarger, gearboxes must be used to accommodate newborns
AccessoriesLess crib and sheet kit optionsMore bedding and crib kit options
Mini bedThe mattress can be reused in mini bedsThe mattress can be availed in mini beds
Other featuresLess soldBest seller

How much?

The price of a crib mattress is often quite affordable. Varies because of size, foam density, and brand, you will pay between $ 150 and $ 200.

Where to buy?

You can buy a crib mattress at furniture and appliance stores such as Magazine Luiza and Tok & Stok, Lojas Americanas and even Walmart supermarket.

You can also shop over the internet at e-commerce like Amazon and Mercado Livre. At Amazon, for example, you can compare models, prices, and brands, as well as read reviews that other consumers gave for that product.

Purchasing Criteria: Factors to Compare Crib Mattress Models

Most models of cribs already come with mattress, but some brands sell these objects separately. If this is your case, be aware that you need to be aware of some details, so that you do not buy the wrong model, they are:

  • Standard size
  • Foam Density
  • Antiallergic
  • Waterproof

We will explain each of the items so that you have no doubt about which mattress you should buy.

Standard size

As explained earlier, there are two models of cribs and mattresses, the national standard and the American. The national standard is slightly smaller, less than 10 inches wide and 2 inches shorter.

The height of the mattress should never exceed 12 centimeters of the American model, because at this time the baby will not reach the crib cradles when standing and this reduces the risk of falling.

The American standard is wider and so it can be used longer, it can also be adapted to mini beds. It is important to note that when the baby is newborn he may be scared of a very large size, so it is important to use reducers.

Pay attention to the crib model you have purchased or will purchase to choose a mattress with a compatible size. Both models can be used in mini beds.

Image of crib in baby room.

The mattress can never be more than 12 cm high, so there is no risk of the crib falling when the baby stands up. 

Foam Density

To choose a mattress with the right density for your baby you can check out a standard table assembled by orthopedic doctors that indicate the right mattress model according to the weight and height of those who will use it.

The most suitable model up to three years is the D18, above this age, it is recommended to replace the mattress with a model D23.


Because the baby’s immunity is low when he is very young, a great way to prevent allergies and other respiratory illnesses is to get a mattress on which the fabric has been treated against dust mites, fungi and other allergy-causing agents.

This detail helps with your baby’s health, so read the product description carefully to see if the model you like has this extra functionality.


Another extra feature you can look for in the mattress for your baby is if the mattress, or at least one side, is lined with waterproof material.

With this coating, it will be much easier to clean up liquid waste such as pee and vomiting. Otherwise, it may be a disorder to be without the mattress for one night if it does not dry in time.


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