How Big Is a Crib Mattress – The Complete Guide

How Big Is a Crib Mattress - The Complete Guide

If you have a newly born baby, then you always want to design a beautiful nursery. You spend a specific amount of money for your children on planning a nursery about everything. Here, the essential thing is to decide on an ideal crib mattress because your little baby spends 14 to 18 hours in a crib. Here, it is important for you to buy a comfortable crib mattress. Every parent is very conscious about the baby’s health and wants an ideal bed for the baby’s safety.

Now, the questions arise in your mind how to select a perfect crib mattress? In which dimensions crib mattress is available? What are the factors to consider buying a crib mattress?

If you are here, it means that you want information about crib mattresses. In this article, we pointed out the dimension of crib mattresses with their qualities that guide you to buy a great-fit mattress for your little baby’s safety.

Types of crib mattresses

Crib mattresses are made in different shapes and dimensions in every brand. So, you can select it according to your basic requirements and room style. 

Standard crib mattress

If you want a perfect bed for your little child with safety measurements then you must look out for the standard crib mattress. It is the most demanding crib mattress in today’s market because of its extensive size and rectangular shape. The kids may outgrow there for at least 3 years.

Standard crib mattress

According to the United States Consumer Product Safety Improvement Act of 2008 (CPSIA), the standard crib matt size is acceptable when their proportions are close to 27 ¼ inches wide and 51 ¼ inches long. When the mattress is bulky, the kids may imbalanced during their standing position. Therefore, the diameter of these mattresses ranges from 4 to 6 inches. If the width of the mattress can excel the required measurements, then it may cause unintentional spilling of your child.

  • It is best to fit a large area of the room
  • It is a little bit costly but it can be used for a long duration
  • You can use it for your baby till they turn 2 years.
  • Many standard cribs can be converted into toddler beds.

Mini crib mattress

These mattresses are smaller in size with hypoallergenic and phthalate-free quality. The layers in these mattresses areCertiPUR-US certified which means that no harmful chemical is used which saves your child from any infection.  Your child can outgrow these smaller crib mattresses in 18 months. If you want a comfortable bed in a small beautifully decorated room for your child then it fits great.

The government of the U.S does not classify the measurement of mini crib mattresses but the guidelines of the Consumer Product Safety Commission (CPSC)state that mini cribs must be sold with mini crib mattresses. These mattresses are commonly available with 24 inches wide and 38 inches long measurements. Some cribs can be easily folded which helps you when you are going on a family trip.

  • Ideal for budget shoppers.
  • Some cribs are easily crumpled.
  • Ideal for small rooms or rooms shared by siblings.
  • If you want a light and moveable crib that can easily roll around the nursery, choose a mini crib with wheels.

Shaped crib mattresses

The shape of crib mattresses may exist in different forms such as the oval, round and hexagonal. There is no law classification from the administration of the UNITED STATES for its shape and size but CPSC instructions are mentioned for it. Therefore, its size is different for every brand. So, you must check out your requirements when buying this crib mattress. this crib is a little bit expensive.

Shaped crib mattresses

  • It is an admirer option that adds an exclusive design component to your baby’s nursery.

Tips for the selection of an ideal crib mattress

Firmness level

If you want a secure and comfortable bed for your little cute kid, then you must check out the firmness level in your baby’s bed. You select a firm mattress to save your baby from plunging into it. If the bed contains softness and does not bounce rapidly when your little child change position then never chooses this type of bed.

It is because these types of beds increase the risk of suffocation which cause the death of babies. In 2020, there were about 1,389 deaths due to Sudden Infant Death Syndrome (SIDS) in the country. Basically, it is an accidental death of newly born babies due to suffocation and strangulation in bed.

Tip to check the firmness of the bed

When you are in a mattress shop to buy an ideal mattress for your kid then first press your hand on the top of the mattress and at the edges. When you release it, If the mattress bounces back immediately then it is ideal for your kid. 

The breathability of the mattress

The mattress must be covered with a breathable Faircloth. It allows air to flow freely through the mattress. It permits moisture to pass through it. Heat and moisture can accumulate in the microenvironment inside the intimate apparel of poor breathable fabric.

It helps to build up a cool environment for your child. It also reduces the risk of suffocation for the child’s safety. It secures the top of the sleeping surface from overheating throughout the whole night and gives your baby a comfortable night’s sleep.

The breathability of the mattress

Organic mattress

Your baby spends a long time period on the bed. So, you must choose an organic mattress that is made of 70% natural organic material. Organic mattresses have CertiPUR-US® certified foam layers which are made without any harmful chemicals and heavy metals. Therefore, it has the ability to fight common microbial allergens which saves your baby’s body from any type of allergies and infections. You must look for GOTS (Global Organic Textile Standard) or GOLS (Global Organic Latex Standard) certified mattresses.


When you are buying a mattress, it is important to note its durability level because you are making an investment. The mattresses that are enough durable have the physical ability to remain functional, without requiring excessive maintenance or repair, when faced with the challenges of normal operation over their lifetime design. Mostly, the crib mattresses are designed to last about five years. This time period may be increased if you’ve been proactive with care. So, for long-term use, your baby’s mattress must be enough durable.

Cost of crib mattresses

Generally, crib mattresses are available at different prices ranging from $50 to $150 in today’s market. However, the rates of these mattresses increase or decrease depending on their features such as water prove top cover of the mattress. 

How Big Is a Crib Mattress – FAQs

Is a crib mattress the same size as a twin?
No, both have different dimensions. The crib mattress is 28 inches by 52 inches while the twin-size mattress is 38 inches by 75 inches. Its mean twin-size bed is 8 inches wider than the crib mattress. For a crib mattress, the child must be shorter than 3 feet. The children mostly like twin-size beds because they are the most concise of all standard sizes.
What material is best for crib mattress?
A waterproof food-grade polyethylene cover and wool puddle pads that can be easily replaced are the best material for a crib mattress.
Is the crib mattress actually that important?
Choosing an ideal crib mattress for your baby is the most crucial decision. It is because the crib mattress is the place where most of the growth period of little babies passed out there. Newly born babies spend 70% and toddlers spend 50% time on mattresses. At least 3 to 5 years of a child are frequently there.
Why are the crib mattress so hard or will it be uncomfortable for my baby?
As we know, the baby spends much of his time on a mattress. So, a concrete and dull surface is required to increase the baby’s growth. The baby begins to push up, change sides, and eventually stand in this crib. It made a comfortable environment for the development of the baby. On the other hand, it also saves your baby from getting suffocated.
What kind of mattress suits my baby?
Crib mattresses exist in two types which are Foam Crib mattresses and Coil/Innerspring Crib mattresses. Every mattress has different, measurements, firmness, durability, pros, cons, and price rate of the bed. You must look out for these features and select the perfect mattress according to your requirements.
How to measure the firmness of the mattress?
If you want to check the firmness level of the mattress, this technique should really help you. Press your hand on the top of the bed and around the edges, if the foam bounce back rapidly then it is a firm mattress.
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The standard toddler mattresses are actually the same size as a standard crib mattress. The dimension of a toddler mattress is 27 inches by 52 inches which is similar to a crib mattress. Some cribs are often known as convertible cribs because they can be converted into toddlers by using the same mattress. Some cribs can also change into twin beds or daybeds.
How to stay warm in crib mattress?
If there is a cold climate and you want to make your baby’s mattress warm. In this way, use a heating pad or hot water bottle all around the mattress for at least half an hour to make a comfortable environment for your little baby’s sweet night dream.



We mention the information which guides you on the right way to buy the best crib mattress. After getting all the answers to your questions, you know what is a better choice for your baby. After buying it, you must maintain the mattress properly and fulfill the safety measurements. if you follow the tips provided in this article, you have a functional crib mattress.

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