What Is The Standard Crib Size?

While designing a nursery, you must know the standard crib size for your baby’s safety. Baby spends most of their time sleeping and playing in the crib. Choosing the right crib and the crib mattress size are major factors you have to consider while designing your nursery. So, in today’s post, I will tell you the standard crib size in cm including the crib mattress size chart.

What Is The Standard Crib Size?

A standard crib size usually measures around 28 inches by 52 inches. However, the dimensions of standard cribs in cm are 71.12 cm by 132.08 cm. It can comfortably fit your child during the first 18 to 24 months of their life. These cribs are larger and more expensive than mini cribs. You can easily convert a standard crib into a toddler bed instead of buying a new bed. 

A crib blanket is essential for your toddlers when they are in the crib. So, you have to know the standard crib-size blanket measurements too. It generally measures about 45 by 60 inches. You can use crib blankets when babies want to get down on the floor and play!

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Common Standard Crib Size Dimensions

In the market, you’ll find different types of cribs. You can consider the following crib types and the standard crib size measurements.

  1. Mini Cribs

A mini crib is smaller than a standard-sized crib. It measures around 24 inches wide and 38 inches long. A small-sized mini crib is perfect when your nursery is short on space. Before finalizing your decision, remember that your baby will outgrow their mini crib after two years. Considering this factor, you may need a bigger bed to fit your growing toddler!

  1. Shaped Cribs

In the market, you’ll find cribs in special shapes like circles or ovals. These are good options when you want to add a unique design element to your baby’s nursery. The dimensions of shaped cribs vary based on their shape. These cribs are bigger than mini cribs but smaller than standard-size cribs.

You can keep on reading to know what is a standard-size crib mattress.

Crib Size Mattress Measurements

Most people get confused while choosing the ideal crib mattress as it is a matter of your little one’s safety. It is important to ensure that the mattress fits inside the crib perfectly. You can consider the following standard-size crib mattress measurements including mini cribs and shaped cribs.

  1. Standard Crib Mattress Size

Generally, a standard crib mattress measures 27 ¼ inches by 51 ¼ inches. It can also be ⅝ inches larger or smaller. Because of this small variation make sure you check your mattress fits properly. Also, remember that it should be no more than 6 inches thick.

  1. Mini Crib Mattress Size

Coming to the min crib mattress size, it should be around 24 inches wide and 38 inches long. These mattresses are also available in different depths. Make sure you research well about the dimensions before finalizing your decision.

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  1. Shaped Crib Mattress Size

Unfortunately, there are no standard dimensions for shaped crib mattresses. Mostly shaped cribs come with a mattress. In case you have a specially shaped crib, make sure the mattress is not too big and not too small.

Note: You can even use a tape measure to determine the correct size of the crib. And then choose a mattress that fits inside your crib.

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Are All Cribs A Standard Size?

All North American crib mattresses must measure between 51 ⅝ to 53 inches in length and 27 ¼ to 28 inches in width (thickness can range from 4 to 6 inches).

What Is A Full Size Crib?

Standard Baby Crib Size

The CPSC requires that full-size baby cribs have a standard width of 28 inches and a standard height of 52 and ⅜ inches, but with a “pull or minus factor” of ⅝ inches.

Do Cribs Turn Into Full Or Twin Beds?

Once your baby outgrows the crib, it can be changed into a toddler bed with a safety rail. It can also convert into a “day bed” (which is essentially a toddler bed without the rail). Lastly, the crib can convert into the headboard for a twin or full bed, depending on the model.

Is Toddler And Crib Size The Same?

The standard toddler mattress size is the same as a crib mattress: 27 ¼ inches x 51 ⅝ inches. Many cribs—often called convertible cribs—turn into toddler beds using the same mattress. Some even convert into a twin bed or daybed as well.

What Are The Different Size Cribs?

5 days ago

The size of the average mini crib is 24 inches wide and 38 inches long, while the size of regular sized-crib is 28 inches wide and 52 inches long. The railings are generally as high on mini cribs as on full-size cribs, so mini cribs are just as safe, just smaller.

Is A Crib And Toddler Bed The Same Size?

The standard toddler mattress size is the same as a crib mattress: 27 ¼ inches x 51 ⅝ inches. Many cribs—often called convertible cribs—turn into toddler beds using the same mattress. Some even convert into a twin bed or daybed as well.

At What Age Do Kids Need Twin Mattress?

Toddler to Child (3.5–8 years)

If your toddler is able to climb out of their crib, they’re ready to make the transition to a twin mattress.


Standard-size baby cribs measure 52 inches in length and 28 inches in width. These are also the standard-size crib sheet measurements. Standard cribs are mostly on the expensive side but they are long-lasting. Remember that the size of your nursery will directly affect the standard crib size you choose. 

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