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Are All Baby Mattresses The Same Size

Toddler Bed Definition & Dimensions

Bed Size Dimensions – What Size Mattress Should You Buy?

These days, a pretty large majority of cribs are actually called convertible cribs.

That just means that, when the time comes, the crib will easily convert to a toddler bed, and sometimes even into a twin or full-sized bed after that.

Most of the time, youll have to purchase some kind of conversion kit, like a half rail to replace the full side-rail thats usually in place on the baby crib.

So with these kinds of convertible cribs, youll pop off the side rail and maybe some other parts of the crib and swap them out with toddler bed rails, and whala! Youve got your toddler bed and your kid will sleep on the same exact mattress, which is about 27 wide by 52 long.

Heres what ours looks like. This is a Pottery Barn crib that converts into a toddler bed and then converts into a full-sized bed.

However, you can buy separate dedicated toddler beds if and when you need to that ARENT convertible cribs.

The picture at the very top of this article is a toddler bed from IKEA that I used for a while.

When it comes to dedicated toddler beds, youll find a lot of variation in the size and dimensions. The one I used was a good bit wider than a standard crib mattress.

Some advantages of separate toddler beds are that you can find more interesting designs, unique sizes, and other cool features.

The Busunge from IKEA actually extends in and out to whatever length you want it to be, though its width remains fixed at about 38 inches.

Crib Mattresses Allarethe Same Size

A standard crib mattress is 28 inches wide by 52 inches long. This size, however, can vary depending on the manufacturer. Some manufacturers do not follow these dimensions exactly and some use inches while others use centimeters. For example, Sealy crib mattresses are made according to this standard but they also offer specialty models that are slightly smaller than the industry standards.

On the other hand, DaVinci crib mattresses are made to industry dimensions with one exception. Some of their models are slightly longer than 52 inches because they want them to fit snugly in the crib so there is no space between the mattress and the cribs sides.

Cribs are available in many different sizes too. Crib mattresses are sized to fit in a standard size crib. If you have a different type of crib, make sure the mattress you choose will fit your particular crib.

Crib Mattress Size: Mini


Coming in smaller than the standard crib mattress is the mini crib mattress. The government does not regulate the size of mini crib mattresses as they do for standard ones. However, the typical size is 24 inches wide and 38 inches long.

Tips For Selecting The Right Mini Crib Mattress

While you can likely purchase most mini crib mattresses and expect them to fit your mini crib, youll still want to double-check the fit because some mini cribs are narrower than others.

Mini crib mattresses are also available in different depths, so be sure to research the dimensions before making a decision.

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How To Choose The Right Mattress Size

Now we come to the meat of the guide, where we take a look at the factors anyone thinking about buying a new bed needs to take into account when choosing.

The last thing youre going to want to do is to overlook anything and end up buying a mattress that does not quite suit your needs. Lets now take a look at things to take into account when choosing the size of your next bed.

Standard Baby Crib And Crib Mattress Sizes

Baby Crib Mattress Size

The safest size of baby cribs and crib mattresses is determined by the federal government. The Consumer Products Safety Commission requires all full-size baby crib mattresses to be at least 27 and ¼ inches in width by 51 and ¼ inches in length, with a maximum thickness of six inches. But for cribs, the standard size isnt as simple.

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What Else Do You Need To Consider

Although you do not have many options when it comes to asking, What is the size of a standard crib mattress?

You do have a choice regarding what type of mattress to choose.

Foam mattresses are often the most popular choice as they tend to be the most reasonable prices, and they are light in weight and therefore easy to handle and clean.

Innerspring mattresses are produced using coils, which means that they provide a high level of support.

Organic mattresses are made from completely organic products, which means that your baby is not exposed to chemicals or allergens that could potentially be harmful.

If you want a mattress that lasts, you may want to choose one with dual support levels so that one side is softer and can be used when your child is very young.

The other side is a little firmer and can be used as your child gets a little older.

Do not forget to take into account the ease of cleaning when you are choosing a crib mattress.

As with most things that come into contact with babies, they are likely to get dirty easily.

Its a good idea to choose a mattress with a surface you can easily wipe, and with a weight that you can easily manage when you are cleaning it.

You can see that crib mattresses sizes are fairly uniform, but there is still plenty to think about when you are deciding on which mattress to buy.

Check out the best baby mattresses money can buy.

California King Bed Size

The California King bed dimensions measure 72″ × 84″. The average length of the California King bed is 84″. The average width of the California King bed is 72″, 4 inches less than a King bed.

If you are looking for a mattress that can truly accommodate taller people, those who like to stretch out in their sleep or share their sleeping spaces with pets or children, nothing will beat a California King mattress. Unless, of course, your name is Marc Gasol, then you might consider something custom.

A little bit narrower and a hand longer, California Kings are the kings of comfort. Tall people won’t have their feet hanging off the bed, sleepers who move a lot won’t be bothering their partners, dogs won’t get kicked off by accident, and there’s plenty of room for a kid to slip in unnoticed when they have a nightmare.

The California Kings luxurious size means you might not have space for end tables or dressers in some bedrooms. For those with space, the sprawling space may be worth it. We suggest some drawers under the bed for convenience, there’s room!

The Pros and Cons of the California King Mattress Size


  • The California King is longer lengthwise. This makes it comfortable for those who are taller or have pets who like to sleep at their feet.
  • The California King mattress dimensions allow for a closer sleeping arrangement than the King mattress size.


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What Are The Most Common Mattress Sizes In The Uk

If you are looking to buy a new mattress, you are probably wondering what the most common sizes are. You might have seen this information in reviews or on the side of mattresses, but it can be useful to have some idea ahead of time and plan around bedroom space before making any decisions.

The most common size of mattress is a UK single which measures approximately 3ft by 6ft . Single beds are typically used in guest rooms or childs bedroom.

There are also several other commonly available UK mattress sizes including double size bed and King size bed . Double beds are typically used in childrens or teenagers’ bedrooms and sometimes as guest beds while King size beds are used in adults rooms or shared bedrooms for couples.

At Naturalmat, we start our range by offering the following standard UK mattress sizes:

Are All Crib Sheets The Same Size

Sleepy Sal – All About Mattress Sizes – What size is best for you?

I was naive enough to think that crib sheets would all be the same size just walk into the baby store and pick up a set. But they arent. That would make parenting too simple, wouldnt it?

I learned that baby crib mattresses come in different sizes, so of course, there have to be different sizes of crib sheets. I also learned that its critically important that the sheets in the crib fit nice and tight to the mattress so that the baby doesnt get tangled up in them. Consequently, size matters.

I had my eye on a standard crib. I learned that there are also mini-cribs and bassinets with their own sheet size requirements because the mattress sizes are different. The Consumer Product Safety Commission has special guidelines for non-standard cribs.

Almost all baby crib mattresses are rectangular, but I learned that there are also designer cribs that are round, hexagonal, and other shapes that are required by law to come with their own specially-fitted mattresses and, of course, will require you to buy specially-shaped crib sheets. I didnt even consider these options because I just assumed theyd cost an arm and a leg.

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What Is The Standard Crib Mattress Size

Standard North American crib mattresses usually measure 51 to 53 inches in length and 27 ¼ to 28 inches in width. Mini crib mattresses are considerably smaller at around 24 inches wide and 38 inches long. There are exceptions since some crib and bassinet manufacturers sell proprietary mattresses to fit their products, but no matter what, its crucial to follow the Health Canada guidelines about thickness and fit.

If you purchase a convertible crib, the mattress will still work when the crib is converted to a toddler bed. If you purchase a stand-alone toddler bed, youll need to measure the frame to ensure that you wont need to purchase a second mattress.

California Queen Waterbed Insert

California Queen Waterbed Insert dimensions are typically 58″ x 82″. The average length of California Queen Waterbed Inserts are 82″. The average width of a California Queen Waterbed Insert is 58″.

The Pros and Cons of the California Queen Waterbed Insert


  • The California Queen Waterbed Insert fits perfectly into your waterbed.


  • California Queen Waterbed Inserts are not available.

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Standard Crib Mattress Dimensions

Baby beds come in all sizes, but the good news is that their mattresses do too. Whatever youve chosen, you will be able to find the right mattress.

In the U.S., its the law that all cribs must fit whats known as a standard full-size crib mattress. And what size is a standard crib mattress?

  • The length of the crib mattress must be between 51 and 53 inches.

  • The width of the crib mattress must be between 27 ¼ and 28 inches.

As for thickness, crib mattresses are usually between four and six inches thick, depending on what theyre made from. Thicker isnt necessarily better. Your baby will get the safest sleep on a mattress thats firm, supportive, and fits the crib frame, however thick it is.


So as long as youre not making the crib yourself in your family woodshop, or inheriting an heirloom from before the standards were set, it should be a standard size.

This means that a mattress that suits it will also be easy to find. Yay!

How Big Is A Standard Size Crib Mattress

Are All Crib Mattresses The Same Size

A standard full size crib mattress must be at least 27 ¼ inches wide and 51 ¼ inches long, with a thickness not exceeding 6 inches. They can be 1 inch wider and longer, but the thickness limit remains the same. Choose the right size for a snug fit depending on the internal dimensions of the crib. It can be 28 inches by 52 inches, or inch smaller or larger.

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How To Choose The Right Crib Mattress Size: The Complete Parents Guide

With a baby on the way, you are likely going to spend a significant amount of time designing a nursery, which requires making decisions about everything from paint colors to diaper storage. In addition to these design choices, youll also have some decisions to make about the place where your little one will spend most of their time the crib. Choosing a crib and the correct crib mattress size are major decisions not only for the design of your nursery but also for your babys safety. In this article, the experts at Newton Baby discuss the types of cribs and their corresponding crib mattress sizes so that you can make an informed decision for your new little one.

Why Go For A Superior Quality Crib Mattress

A crib mattress is one of the essential parts of a babys nursery.

Acquiring a high-quality crib mattress comes with many perks.

The best crib mattress will enhance the comfort of your child as she or he sleeps.

The best mattress doesnt contain any scented aromas that can cause respiratory problems.

Moreover, a babys skin is very delicate, hence the need for a quality mattress to avoid skin irritation.

With a high-quality mattress, your baby gets more quality and uninterrupted sleep and sleeps for long, which promotes better health.

According to, there are different cooler mattresses in the market, and all have distinct features and qualities.

On top of a quality mattress, you can as well acquire other cooling solutions like a mattress topper and cooling pad for a more comfortable sleep.

When your baby sleeps well, you allow the body and brain to generate the right hormones required for optimal bone development.

Youll also sleep better, and this improves your health.

If youre really concerned about everyones overall well-being at home, particularly your baby, youd also go beyond taking concern about the mattress and other things.

If you wish to improve the overall feel in your home, as you shop, you may also want to include other things like humidifiers and healing stones, among others.

For the latter, aquamarine is a good choice to have in your nursery or babys roomlearn about aquamarine meaning and what it can do for you.

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Bed Size Chart / Mattress Size Chart

If you’re in the market for a new bed, it can be hard to find one that fits your room and sleeping habits. Luckily, this article will help guide you through all those sleep-related decisions with our comprehensive mattress size chart! Whether you’re looking for something small like a Twin or if don’t want anything less than what California King has to offer we’ve got an option out there exactly right for your needs. So, stop by today and let us show off some of these fantastic mattresses so they’ll fit perfectly into any space around town.

274 cm x 274 cm This is the largest mattress available.

The sizes between coil and foam mattresses vary a bit, but there’s a particularly good reason! Innerspring coil mattresses are much harder and don’t squish around as foam mattresses do. As a result, and to make it easier to fit into frames and tuck sheets under them, they’re often just a touch smaller. This difference won’t be noticeable in your bed frame, so don’t worry!

The stiffer nature of the innerspring coil does have to be accounted for, but the manufacturers do that for you.

All these sizes have different intended purposes, and below we’ve listed those for you! Whether your baby is growing up and you want to get them a real bed to sleep in, or the old double you sleep on isn’t good enough for two people anymore, there are options for everyone.

  • Due to the risk of litigation, most mattress manufacturers do not offer this size of mattress.

Cot Bed Mattress Size

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Cot bed mattresses are a great option for a first bed for your baby.

The standard size of a cot bed mattress in the UK is 70cm x 140cm, which will fit in all standard sized cots. The 140 cm length and the 70 cm width will accommodate most children up to about 3 years old, giving them more space to relax.

A traditional crib mattress may not provide enough support for your child, whereas the mattress in an adjustable height crib like a cot bed does.

The 70cm x 140cm width and length will fit nicely around the wall of the cot, while still giving enough room for your baby to move around and play comfortably.

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You Feel Like Theyre Ready

If your toddler is a pretty good listener, generally well-behaved, and does well during the bedtime routine, youll probably do great switching to a toddler bed.

If theyre incredibly unruly, dont listen at all, and you worry theyll simply run amok in their room throughout the night, well it might not be time yet.

Having a big-kid bed is a pretty serious responsibility! Its not so much about size, development, and age as it is trust that your child wont abuse their newfound freedom.

Convertible Standard Size Baby Crib

Convertible cribs convert into one or more different bed options. Those cribs grow with your child! Some models can transform up to the full-size adult bed. Such convertible cribs can be even a lifetime bed for your child.

You have to buy conversion kits for transformations separately for most models. Only a few convertible cribs have the safety guardrail for a toddler bed included in the price. A great example are Babylettos convertible cribs.

Why am I telling you this? Because it is very important to read the specifications for a specific convertible model thoroughly. Lots of times parents think they will get everything included in the price. As such, the crib looks affordable. But when they buy all the extra parts, it is quite expensive.

Also, make sure what the numbers in the name of convertible crib mean! For example, it is not necessary that all 3-in-1 convertible cribs convert into a toddler and daybed. Some can skip one of these phases and convert directly into a full-size bed. Check what numbers in the name means!

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