Mattresses

Published January 28, 2022

8 min

Crib Mattress Size Guide 2023

Nectar Editorial Team

Table of contents

Crib Mattress Size ChartTypes Of CribsHow to Choose the Right Crib Mattress Size?How to Choose a Crib MattressFrequently Asked Questions

A baby spends almost 14 to even 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 may play an important role, the first step is to select the correct crib mattress size. We will walk you through all the different sizes of crib mattresses available in the market, so you end up making the best choice for your little one. Just read ahead to know more.

Crib Mattress Size Chart

The basic crib sizes include standard and mini, while you can also find them in different shapes, such as oval or round. The standard crib mattress size is 27 inches by 51 inches, whereas, mini crib size is 24 inches by 38 inches. The thumb rule one has to follow is to leave ½ an inch gap between the mattress and the crib. So, choose the size accordingly. Take a look at the dimensions of a crib mattress below.

Type of Crib	Size in inches	Size in cm
Standard Crib	27 in X 51 in	68.58 X 129.54 cm
Mini Crib	24 in X 38 in	60.96 X 96.52 cm
Shaped Crib	The standard shapes of crib include round, hexagonal, or oval.

Types Of Cribs

Now that you are familiar with the common types of cribs and crib mattress dimensions, let’s understand more about crib types.

Standard Cribs

One of the most popular choices for a crib is the standard-sized crib mattress. Why? Because of its size. It is big, and your baby will not outgrow it very soon. They are rectangular in shape and a perfect choice for toddlers too.The standard cribs mattress size is 27 inches by 51 inches, and the recommended thickness is 6 inches. 6 inches is the optimal thickness size; if it exceeds, it can lead to accidental falls. When mattresses are thick, toddlers may lose their footing when standing.

Mini Cribs

Usually, mini cribs are sold with mini crib mattresses as the size is not regulated and it can slightly differ from one brand to another. While the size is approximately 24 X 38 inches. This is an excellent choice, especially if the nursery is small. You will also find a few cribs that can be folded when you are traveling and can be stored easily.

Shaped Cribs

The standard shapes include round, hexagonal, or oval. One of the reasons your parents may opt for 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.

How to Choose the Right Crib Mattress Size?

We bring you all the tips that can help you in choosing the right crib mattress size.

Standard Crib Mattress Size

The dimensions of a standard size crib mattress include 27 X 51 inches and they are 6 inches thick. Some of the pointers you can consider here are;

You can opt for a standard crib mattress if you don’t want your little one to outgrow it very soon. They can easily fit your child until they turn 24 months.
A standard crib is more traditional when it comes to style and design.
Standard cribs can be slightly expensive but are long-lasting.
A standard crib is more suitable for large rooms that are at least 12 ft x 18 ft.

Mini Crib Mattress Size

The dimensions of a mini crib mattress size are 24 X 38 inches. Important factors about mini cribs are;

Mini cribs are also known as portable cribs and you will also find a few varieties that can be easily folded. This especially helps if you travel a lot with your little one.
They are more affordable.
This is an excellent choice in homes with no separate nursery space.
You will have to monitor your child’s growth in a mini crib to check if they have outgrown it or not.

Shaped Crib Mattress Size

There are no standard dimensions for a shaped crib. However, some of the essential points for a shaped crib include;

Since there is no set size when it comes to a shaped mattress, make sure you choose the one where your child can sleep comfortably.
A shaped crib is usually a fancier option.
It can be slightly expensive, depending on the brand.

How to Choose a Crib Mattress

Now that you are clear about the sizes, let’s look at a few tips that can help you choose the perfect crib mattress.

The firmness of the mattress

While you may enjoy a soft and cozy mattress, that’s not the case with your little one. The crib mattress should be firm. Make a note here that firm doesn’t mean a hard mattress. A firm mattress is ideal because it avoids the risk of sinking in, which can even cause suffocation and a soft mattress makes it difficult for toddlers to stand, increasing the risk of accidental falls.

The breathability of the mattress

A non-breathable mattress will make it uncomfortable for the child as it doesn’t allow proper air circulation and temperature regulation. Therefore, check if the mattress is breathable before making a purchase.

The durability of the mattress

When you are buying a crib and a mattress, you are making an investment. So, it is vital to see if the mattress is durable enough.

Organic mattress

It is important to choose a mattress with low chemical content, and the best way to do this is to go for an organic mattress. However, to verify the certifications as an excellent organic mattress must have more than 70 percent organic material.

The cost of the mattress

A standard crib mattress costs about $150. However, it can go up or down depending on the quality and the inclusion of other features, such as waterproof covers. Now it’s safe to say that you know all the crib mattress sizes and know about all the factors you must consider before making a purchase. So, choose wisely!This article is for informational purposes and should not replace advice from your doctor or other medical professional.

Frequently Asked Questions

How big is a crib mattress? The standard crib mattress measures 27 X 51 inches. The size of the crib mattress differs from one size to another. Are all crib mattresses the same size? No. There are three main types of crib mattresses and they have different dimensions. Is a crib mattress the same size as a twin? No. A crib mattress is shorter and also narrower than a twin. Is a toddler bed the same size as a crib mattress? Yes. A toddler bed is the same size as a crib mattress.