Mattress Size Chart

Happy salesman and his clients in mattress store

Size Dimensions
Twin 38" X 75"
Twin XL 38" X 80"
Full

54" X 74"

Queen 60" X 80"
King 76" X 80"
California King 72" X 84"

When choosing a mattress, there are many factors to consider including size, comfort preferences, and price. The size of the room, sleeping partners, height, sleeping position, and available space should be considered when choosing the mattress size. Our team at American Mattress is here to help you find the perfect mattress to satisfy your needs and assist you through each step. Get started by looking through our mattress selection from top-rated brands in all sizes.


Twin Mattress Dimensions

How Big is a Twin Mattress? 

38” X 75”


Twin size mattresses are the smallest standard mattress size. They measure 38” X 75” and are intended for single sleepers. Twin-size mattresses work great for children’s rooms, bunk beds, small bedrooms, and guest rooms.

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Twin XL Mattress Dimensions

How Big is a Twin XL Mattress?

38" X 80"


The Twin XL mattress is ideal for tall individuals needing more legroom with their mattress. It measures 38” X 80”, making it the same width as a standard twin with 5 more inches in length. With their narrower size and extended length, Twin XL mattresses and mattress sets fit well in smaller spaces while offering more room to stretch out than is available in a standard twin.

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Full Mattress Size Chart

How Big is a Full Mattress?

54" X 75"


Full-size mattresses are great for growing children, single sleepers, and rooms with narrower floor space. Full-size mattresses measure 54” X 74” and fit easily in standard bedrooms and guest rooms. A full-size mattress is a perfect transitional mattress at an economical price. While offering more spacious sleep than a twin-size mattress, a full-size mattress is easy for young adults to move from home to their first apartment.

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Queen Mattress Dimensions

How Big is a Queen Mattress?

60" X 80"


Queen size mattresses are the most commonly purchased of all sizes. They measure 60” X 80”, offering a comfortable size for couples and a reasonable size that fits well in almost all bedrooms. A Queen size mattress is possibly the most cost-effective for couples and due to its popularity, it has the added benefit of a huge style selection when it comes to bedding sets, bedroom furniture, and bed accessories.

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King Mattress Dimensions

How Big is a King Mattress?

76" x 80"


King Size mattresses are great for couples looking for luxury comforts, more sleeping space, or room to share with children and pets. King-sized mattresses measure 76" X 80" and they are the largest mattress size by US standard manufacturing. It is encouraged to measure the room’s floor space before buying a King size bed to ensure a comfortable fit.

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California King Mattress Dimensions

How Big is a California King Mattress?

72" x 84"


California King mattresses are ideal for tall people needing extra length to avoid having their feet hang off the bed. California King beds are great for individuals and couples due to their narrower dimensions. With a California King size bed, you receive an extra 4” of length and lose 4” in width in comparison to a standard king-size bed. This difference in size helps make the California King fit better into smaller spaces than a standard King while helping taller individuals get more restful sleep.

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Frequently Asked Questions

What is the size of a single mattress?

A single and a twin size mattress are the same sizes. Both have the dimensions of 38" by 75", which are designed to fit one person.

A single mattress and a twin mattress are the same size mattress. Both have the dimensions of 38" by 75". These mattresses are designed to fit one person.

What is the difference between a full bed and a double bed?

Full and double-size mattresses both represent a mattress of the same dimensions, 54” by 74”.

Full-size beds and double beds are the same bed. Both names represent the same mattress size. Both terms refer to the mattress size of 54" by 74".

Are double beds twice the size of twin beds?

Double mattresses, also known as full-size mattresses are 16” wider than twin-sized mattresses and are of similar length. Contrary to the name, a full-size mattress may be better suited for single sleepers. Historically, they were popular options for sleeping partners in the 1960s; however, there is only 27" across for each person's sleeping area. Alternatively, the 74" in length may work well for dual, shorter sleepers; but it also may be uncomfortable for tall individuals. The decision to purchase a full-size mattress for two people is entirely up to you! Visit an American Mattress location to test a full-size mattress and find the perfect size for you.

No, double or full-size mattresses are 16" wider than twin size mattresses and are of similar length. Contrary to its name, full size mattresses may be better suited for single sleepers. Historically, they were popular options for sleeping partners in the 1960's; however, there is only 27" across for each person's sleeping area. Alternatively, the 74" in length may work well for dual, shorter sleepers; but it also may be uncomfortable for tall individuals. The decision to purchase a full size mattress for two people is entirely up to you! Visit an American Mattress location to test a full size mattress and find the perfect size for you.

What is the difference between a king and California king?

The difference between a king size mattress and a California king is 4". A king mattress is 4" wider than a California king, while a California king is 4" longer than a king mattress.

The difference between a king size mattress and California king is 4". A king mattress is 4" wider than a California king, while a California king is 4" longer than a king mattress.

What is the most popular mattress size?

The difference between a king size mattress and California king is 4". A king mattress is 4" wider than a California king, while a California king is 4" longer than a king mattress.

What are the measurements of a California king-size mattress?

A California king-size mattress is 72” by 84”, it is best suited for individuals or a couple. The additional length is helpful for taller people however, it lacks 4” of width that the king size bed offers.

How big is a queen size mattress?

A queen size mattress is 60” by 80”, and is the most common size of the mattress. It will comfortably fit couples or individuals and the reasonable size fits in almost all bedrooms.

Because of its versatility, cost, and size, the queen size mattress is the most popular. It can easily provide enough sleeping space for two people while also being a reasonable size that fits in most spaces. It is a budget friendly option for sleeping partners with the most popular bedroom furniture and bed sheet set options available. It is also easier to move in and out of narrow hallways and stairs than a king mattress.