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"

There are many factors to consider when picking a new mattress including size, comfort preferences, and price. When it comes to picking the right mattress size, it is important to consider the size of the room, sleeping partners, your height and preferred sleep position, and available space. Our team at American Mattress is here to help you every step of the way to ensure you find the perfect mattress for your needs. Browse our mattress selection from all top-rated brands in all sizes to get started.


Twin Mattress Dimensions

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, bunkbeds, small bedrooms, and guest rooms.

Shop Twin Mattresses
Twin XL Mattress Dimensions

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.

Shop Twin XL Mattresses
Full Mattress Dimensions

Full Mattress

54" X 74"


Full size mattresses are great for growing children, single sleepers, and individuals working with a 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 first apartment.

Shop Full Mattresses
Queen Mattress Dimensions

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, as well as a reasonable size that fits well in almost all bedrooms. The Queen size mattress can be 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.

Shop Queen Mattresses
King Mattress Dimensions

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.

Shop King Mattresses
California King Mattress Dimensions

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.

Shop California King Mattresses

Frequently Asked Questions

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.

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".

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.

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.

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.