Mattress Dimensions – What is The Largest Mattress Size?

By Sakibul Islam

It’s overwhelming how many mattresses of different sizes and dimensions you can find out there.

You may not think it isn’t necessary, but you do need to have a bit of information about the common mattress dimensions that we have today.

Luckily for you, we have researched some of the most universal bed sizes, and have explained their features in this article.

Our Top 2 Recommended Queen Size Mattress

Best One: PlushBeds Organic Mattress

For those seeking an eco-friendly mattress made with the highest quality organic materials, the PlushBeds Organic Mattress is an excellent choice. This model features GOTS-certified organic cotton as the main component. The cotton offers a soft, breathable surface to allow airflow and prevent overheating.

Best Budget: Sweetzzz Honey Hybrid Mattress

The Honey Hybrid Mattress from Sweetzzz offers the perfect combination of comfort and support. This mattress features a hybrid design with both foam and pocketed coils, providing pressure relief as well as bounce and edge support. The top layer is made of cooling gel memory foam that contours to the body and relieves pressure points.

Mattress Dimensions

Most Modern mattress models come in these seven sizes: King, California King, Queen, Full XL, Full, Twin XL, and Twin. Each one of these mattress sizes is so designed in other to suit a specific purpose for users.

Many factors affect the choice of mattress size that a person makes. It could be the room size, the number of people sleeping on the bed, the budget, and other factors.

Whatever your reason may be, we have analyzed the features of each bed size here and hope it helps you decide the mattress size to buy.

Mattress SizeMattress DimensionsMattress Dimensions(CM)
King76" wide x 80" long193cm X 203.5cm
California King72" wide x 84" long183cm X 213.5cm
Queen60" wide x 80" long152.5cm X 203.5cm
Full XL54" wide x 80" long134.5cm X203.5cm
Full54" wide x 75" long134.5cm X 190.5cm
Twin XL38" wide x 80" long96.5cm X 203.5cm
Twin38" wide x 75" long96.5cm X 190.5cm

King Size Mattress (76″ x 80″)

King Size Mattress (76 x 80)

King size mattresses measure 76 inches in width and 80 inches in length. This bed is designed to suit couples who like much space because of their sleeping style and position.

The bed affords couples enough space to spread out during sleep without disturbing the other partner. This bed works well for light sleepers and gives room for a child or pet to sleep with the couple too.

This mattress is the largest of standard mattress sizes and is thus a bit more expensive. However, with space and comfort the bed provides, the cost is justified.

A king size bed takes up much space, so make sure to measure all the necessary areas your house (doorways, entryways, etc.) and bedroom to ensure that the bed will fit in perfectly.

California King Mattress (72″ x 84″)

California King Mattress (72 x 84)

The California King Size mattress has a dimension of 72 inches by 84 inches. This bed is best suited for people who are tall and have long feet.

Because of the length of this bed, there’s no fear that a person’s feet will be too long to fit comfortably on the bed. While this bed is the longest of standard mattresses, it is not the widest. In terms of width, California King is lagging behind the standard king size bed by 4 inches.

However, the bed is big enough and can still work for couples.

Queen Size Mattress (60″ x 80″)

Queen size mattresses are the commonest of all the mattresses in the market today. While their width is only 60 inches, and thus way narrower than King Size beds, their length is 80 inches like the case for King size beds.

This bed is the gold standard in the mattress industry today. Despite their width, they can still work for couples. Apart from the fact that they are cost-effective, they do not take up as much space as King Size beds.

Full XL Mattress (54″ x 80″)

Full XL Mattress (54 x 80)

With a measurement of 54 inches by 80 inches, a full XL mattress is just as wide as a full mattress. However, it is 5 inches longer than it. This kind of mattress is designed for only one sleeper.

It is suitable for tall people and those who are not keen on spaciousness. Even though full XLs cannot accommodate a couple, many of their models have the same price as queen size beds.

This bed is the largest size bed that is intended for only an individual and will work well for an active sleeper.

Full Size Mattress (54″ x 75″)

Full Size Mattress


Full mattresses are 54 inches wide and 75 inches long. They are also referred to as double, modern full-size mattresses. They are wider than a twin mattress and thus a good option for people who like space and width.

They’re not as long as the full XL, in any case. This mattress used to be the standard bed for couples until the introduction of Queen Size Mattresses.

Thus, the full-size mattress is no longer seen as a bed for couples and are mostly used by single sleepers. Though the bed can still fit couples, they prefer to go for queen size beds since there isn’t that much difference between the two in terms of price.

The bed is, however, wider than twin beds, and spacious enough for active sleepers.

Twin XL Mattress (38″ x 80″)

Twin XL Mattress (38 x 80)

Twin XL mattresses have a dimension of 38 inches in width and 80 inches in length. While this kind of mattress is intended for one person, its width is a little too narrow for an active sleeper.

They are not wide enough for two people and are recommended for teens and adults who would like to save space or money.

Twin Mattress (38″ x 75″)

Twin Mattress (38″ x 75″)

With a dimension of 38 inches by 75 inches, Twin size mattresses are the smallest of all the mattresses listed here. The good thing about this is that they are the least expensive of all the standard mattress sizes as well.

These mattresses are made for single sleepers who are not active sleepers. Twin size mattresses are not ideal for sharing and are best suited for kids.

What Is The Largest Mattress Size?

Usually, the California king size bed takes the prize as the largest bed size. It has a length of 84 inches and a width of 72 inches. However, some people consider the Eastern king bed, which is another name for the standard king bed, as the largest.

The thing is both of these beds are unique in their own way. California king beds have the extra length that is lacking in normal king size beds.

However, standard king size beds are much wider than California king beds. Both beds are comfortable royal beds and are both large. In the end, the final choice will depend on the individual making the purchase, and such a person’s needs.

However, there are companies in the mattress making industry that go-ahead to make mattresses that are way bigger and larger than most standard beds. The emperor size bed, for example, is 215 cm long and 215 cm wide.

This is much larger compared to other standard sizes of mattresses. This mattress also comes in different lengths. As spacious as they are, however, they are rare, and may thus not be easily found.

Caesar mattress sizes are the largest possible mattress size available. They are even larger than emperor size beds with a dimension of 245 cm in width and 220 cm in length.

These bed sizes are made to fit in enormous bedrooms. The mattress can house up to seven individuals. This bed too may come in varying dimensions, but all in all, they are very spacious, comfortable and magnificent.

They take up around 3 meters of width and at least 2 meters of a room’s length. Like emperor beds, they too are rare. Of course, both the emperor bed and Caesar bed will cost a fortune, considering their unusual enormously size.

Bottom Line

Now that you know all about mattress dimensions and sizes, we hope that you use the information judiciously when next you go on a mattress hunt.

Remember to consider the available space in your bedroom, your size, your budget, and other things before you buy a mattress. Also, ensure that there’s a space of 30 inches between the wall and each of the three sides of the bed.

About the author

Sakibul the founder of Houzmark and co-founder of Houzhold, is a product reviews analyst who researches, compares, reviews, and writes about home appliances. With his extensive knowledge and experience, he provides valuable insights and recommendations to help consumers make informed decisions when purchasing products.