Mattress Sizes and Dimensions Chart

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.

Mattress Size and Dimensions Chart

Mattress Size Mattress Dimension Recommended Room Size
California King 72 inches by 84 inches 12 feet by 12 feet
King 76 inches by 80 inches 12 feet by 12 feet
Olympic Queen 66 inches by 80 inches 10 feet by 10 feet
Queen 60 inches by 80 inches 10 feet by 10 feet
Full XL 54 inches by 80 inches 9 feet 6 inches by 10 feet 6 inches
Full 54 inches by 75 inches 9 feet 6 inches by 10 feet 6 inches
Twin XL 38 inches by 80 inches 9 feet 6 inches by 10 feet 6 inches
Twin 38 inches by 75 inches 7 feet by 10 feet
Small Single 30 inches by 75 inches 7 feet by 10 feet

California King: 72 inches by 84 inches

California King Size Mattress DimensionsMinimum 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 Mattress: 76 inches by 80 inches

King Size Mattress DimensionsMinimum 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: 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 Mattress: 60 inches by 80 inches

Queen Size Mattress DimensionsMinimum 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 Mattress: 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 Mattress: 54 inches by 75 inches

Full Size Mattress DimensionsMinimum 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, this 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 Mattress: 38 inches by 80 inches

Twin XL Size Mattress DimensionsMinimum 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 Mattress: 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 Mattress: 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 crib mattresses and sometimes serve as toddler beds. The small single size is best suited for babies and toddlers.

 

Other 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.

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.

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.

Amerisleep: Enjoy the morning you've dreamed of.

McKenzie Hyde

McKenzie Hyde is a Certified Sleep Science Coach and a full-time writer focused on sleep health and the mattress industry. McKenzie’s writing focuses on the sleep health 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 has her 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.