Mattress Sizes Chart and Bed Dimensions Guide

By McKenzie Hyde
Last Updated On June 15th, 2020

Apart from the texture and feel, there is another very important facet of your mattress which influences your choice—the size. Getting the right size mattress is one of the crucial…

Mattress Sizes Chart and Bed Dimensions Guide

Apart from the texture and feel, there is another very important facet of your mattress which influences your choice—the size. Getting the right size mattress is one of the crucial determinants leading towards the ultimate goal of a good night’s sleep.

When looking for a new mattress, choosing the right size from a plethora of options can be difficult, especially when there are sub-categories in certain segments. With very little difference in dimensions between certain sizes, getting the right fit for yourself can be a daunting task.

The size of your bedroom and your budget are key factors in your decision-making process when looking for the ideal bed size. In this mattress sizes and dimensions guide, we will discuss the different mattress sizes available and the recommended room size for each of them to help you choose the most-fitting mattress size.

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Mattress Size and Dimensions Guide

Mattress SizeDimensions (IN)Dimensions (CM)
California King72 inches by 84 inches183 cm by 213.5 cm
King76 inches by 80 inches193 cm by 203.5 cm
Olympic Queen66 inches by 80 inches167.5 cm by 203.5 cm
Queen60 inches by 80 inches152.5 cm by 203.5 cm
Full XL54 inches by 80 inches137 cm by 203.5 cm
Full54 inches by 75 inches134.5 cm by 190.5 cm
Twin XL38 inches by 80 inches96.5 cm by 203.5 cm
Twin38 inches by 75 inches96.5 cm by 190.5 cm
Small Single30 inches by 75 inches76.2 cm by 190.5 cm
Crib27.25 inches by 51 inches69.2 cm by 129.5 cm

California King Size Bed Dimensions: 72 inches by 84 inches

California King Size Mattress Dimensions Minimum recommended room size: 12 feet by 12 feet. The California king size is the longest available mattress (in terms of standard mattress sizes). It is 4 inches longer than the king size but is also 4 inches narrower. So technically what you gain in length, you lose in width in a California king bed— but the extra length makes it suitable for tall sleepers. California king beds can accommodate two sleepers comfortably and sometimes an extra sleeper as well, like parents co-sleeping with their child. This makes it a good choice for families.

The California king mattress may also come with the split option. In this style, the California king mattress is split into two equal parts, to provide for partners with different mattress preferences and work with adjustable beds.

King Size Bed Dimensions: 76 inches by 80 inches

King Size Mattress Dimensions Minimum recommended room size: 12 feet by 12 feet. Sleeping on a king size bed is sleeping in luxury. There is enough room for two sleepers to sprawl and sleep in their own space. It provides 4 inches of extra width than the California King, but it’s 4 inches smaller in length. King mattresses are the widest available standard size, making it a good choice for families— if parents want to co-sleep with their children, this size can accommodate them.

The king size also comes with a split option; this is really two Twin XL mattresses placed side-by-side. The split king option serves couples with different mattress preferences, so in one bed they can have two different mattresses to suit individual needs. This style is also a good fit for adjustable beds with split-side functionality.

Olympic Queen Mattress Dimensions: 66 inches by 80 inches

Olympic Queen Size Mattress Dimensions

Minimum recommended room size: 10 feet by 10 feet. The Olympic queen mattress is six inches wider than the standard queen size and provides enough room for a couple to sleep comfortably, but is not considered to be a “standard size.” Even when found, it’s an ordeal to find bedding accessories like sheets to match this size.

 

The benefit of an Olympic queen size is that it provides a little extra space than the queen size, while not being as big as a king. If your room is not big enough to accommodate a king, but you need more space for sleepers, then this Olympic queen size fits the bill. The Olympic queen size is meant for RVs and camper trailers and are more commonly seen inside mobile homes.

Queen Size Bed Dimensions: 60 inches by 80 inches

Queen Size Mattress Dimensions Minimum recommended room size: 10 feet by 10 feet. A queen size mattress is popular for couples who don’t require too much space, or for a single adult preferring extra space to sprawl out while sleeping. The standard queen size is recommended for couples, so it can be a good bed for the master bedroom or guest room, comfortably accommodating extra sleepers in the house for a few nights. This is the most common standard size mattress which conveniently fits into almost any room and can accommodate more than one sleeper.

The queen size mattress also comes in a split queen option. In this style, the queen size is split into two equal halves to provide for couples who have different mattress preferences; so while sharing the bed, they can have a mattress suited to their personal preferences.

Full XL Size Bed Dimensions: 54 inches by 80 inches

Full XL Size Mattress Dimensions

Minimum recommended room size: 9 feet 6 inches by 10 feet 6 inches. The full XL size has an extra 5 inches in length than a standard full. The extra legroom makes it a good fit for taller individuals sleeping by themselves. It can also be a good choice for a spare bed in your guest room.

 

Full Size Bed Dimensions: 54 inches by 75 inches

Full Size Mattress Dimensions Minimum recommended room size: 9 feet 6 inches by 10 feet 6 inches. A full-size mattress is best suited for a single sleeper. For couples, a full size mattress might not be a good choice for a comfortable sleep, but for an individual, this provides enough space to sleep comfortably and also fits into most rooms without making it look crowded. This size can also serve as a good option for a spare bed.

Twin XL Size Bed Dimensions: 38 inches by 80 inches

Twin XL Size Mattress Dimensions Minimum recommended room size: 9 feet 6 inches by 10 feet 6 inches. This size is 5 inches longer than the standard twin size, making it a preferred choice for taller individuals. The twin XL size is always a good option to accommodate extra guests on short notice. Since they don’t require much space and are less expensive than a queen or a full, it won’t be difficult to have one as a spare.

Twin Size Bed Dimensions: 38 inches by 75 inches

Twin Size Mattress Dimensions

Minimum recommended room size: 7 feet by 10 feet. The smallest of all standard sizes, this is one of the most common beds available. The twin size mattress is good for children and teens alike, accommodating children in their growing stages. However, it may not be a good fit for a full-grown adult. It is a good size to fit into smaller rooms, and ideal for bunk beds, too.

Small Single Size Bed Dimensions: 30 inches by 75 inches

Single Small Size Mattress Dimensions

Minimum recommended room size: 7 feet by 10 feet. This is the ideal size for toddler beds and some crib mattresses. The small single size is best suited for babies and toddlers.

Crib Size Bed Dimensions: 27.25 inches by 51 inches

Crib

A crib size mattress is approximately 6 feet by 4 feet and only meant to fit inside a crib. The standard crib mattress size is regulated by the federal government for safety reasons, so it’s pretty easy to find crib size sheets that fit your mattress, as long as the one you choose is up to the current standards. A crib size mattress should not be more than 6 inches thick.

 

Other Mattress Size Factors that Influence Your Decision

Buying a mattress is a long-term investment in your health, and there are a number of things to think about during your search for the best mattress. Almost all mattress types (memory foam, latex, innerspring, and hybrids) are available in all standard sizes, but factors like the size of your bedroom also have to be considered while deciding on the size of your mattress.

Who’s Using the Mattress

This is one of the most critical factors to be considered while choosing the perfect mattress size. If you are an individual sleeper who does not share a bed with anyone, you can eliminate king and California king mattresses from your list— queen, full, or full XL beds would likely be the most fitting. We recommend queen and full XL mattresses to those who prefer some space to sprawl, and full and twin XL options to sleepers who need to save space.

However, if you plan on sharing your mattress with a partner or child, you’ll want to choose a queen, king, or California king. If you and your partner like to co-sleep with your children, a king or California king would be better accommodating.

Size of the Room

Keep in mind that your bedroom does not comprise just your bed. You need to leave space for movement and other comfortable furniture. The bedroom is your relaxing space, where you crawl into at the end of the day to rest and rejuvenate yourself. An overcrowded space may cause stress and make sleep more difficult. So a huge bed in a tiny room is not an ideal recommendation.

Location of the Bedroom

Maneuvering a king or California king size mattress may be difficult for some, so when buying a new bed be mindful of the size. If your bedroom is not on the first floor, consider the width of the stairways and how challenging it might be to get the mattress from one floor to another. Bed in a box mattresses are a solution to this once-common problem, but some beds can still be difficult to maneuver.

Budget

Budget is another important criterion because it determines available options. Once you have gone through all the other factors, it is time to step back and set a realistic budget for yourself. Look at materials, mattress brands, and read mattress reviews to determine the best choice.

Mattress Size FAQs

Is the California king bigger than the king?

Technically they are both the same size, but the California king is 4 inches longer than the standard king while the king is 4 inches wider than the California king.

Are there any more sizes of mattresses?

There are some oversized beds like the Alaskan king, Texas king, and Wyoming king, but they are way larger than the standard king and California king and are not easily found on the market.

What’s the difference between a twin and a single mattress?

The dimensions; a single mattress is slightly smaller than a twin and best suited for toddlers. A twin size mattress will work with a toddler or a child transitioning out of a crib, but it will also grow with them as they get older. Twin size beds are even suitable for teenagers.

Is a full size mattress big enough for 2 people?

It depends on the size of the couple and their sleeping preferences. If you need more room to spread out or if you move around a lot while you sleep, a full size bed may be too small. If one or both of you are taller or wider than average, a full size mattress probably won’t offer enough space.

Are full size mattresses the same as double beds?

Yes, full size and double mattresses are the same. Both mattresses are 54 by 75 inches. The name “double” comes from the idea that a full size mattress is twice the size of a twin, but it’s actually 15 inches wider.

What size mattress do two side-by-side twin beds make?

Contrary to popular belief, two twin size mattresses side-by-side do not equal a king. However, two twin XL mattresses are equal to a king size bed. Two twin size mattresses are just as wide as a king, but not as long (they are 5 inches shorter).

What’s the largest mattress size?

The largest mattress size is an Alaskan king, which is 9 feet by 9 feet. To put that into perspective, a standard king size bed is closer to 6 feet by 6 feet.

What’s the most popular mattress size?

The most popular mattress size today is the queen. It’s large enough for most couples but fits into an average-sized bedroom. It’s also a nice option for single folks who need more surface area than a twin size mattress can provide.

Conclusion:

Just as the firmness and type of mattress you choose play a role in your overall comfort, finding the right size mattress is equally important. To optimize your comfort level during your sleep, space is crucial, not just the space of the bed, but also the aesthetics of space in your bedroom. You have to walk the balance between your needs, your room size, and your budget to get the most out of your mattress.

This article is for informational purposes and should not replace advice from your doctor or other medical professional.


About the author

McKenzie Hyde is a Certified Sleep Science Coach and a full-time writer focused on sleep health and the mattress industry. She currently writes articles on a variety of topics, ranging from sleep hygiene to the newest trends in the mattress and bedding industry. Just some of the topics she has covered include best sleep practices for students, the consequences of going without sleep, and choosing the right bed if you suffer from back pain. McKenzie Hyde holds a Master of Arts degree from Utah State University where she studied literature and writing. While there, she taught argumentative writing and wrote a variety of articles and analyses for literary and academic journals.

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