What is the Difference Between a Double Bed and Full-size Mattress?


54 inches by 75 inches is the same size as a double bed and a full size mattress. In fact, people often use the terms “double bed” and “full size mattress” interchangeably.

“Double” and “full” mean the same thing when it comes to mattress sizes. Even though full beds are called “doubles,” they aren’t big enough for two adults to sleep comfortably.

What’s a Double Bed?

Before queen and king size beds came out, couples liked to sleep in double beds. When two people share a double mattress, each person has only 27 inches by 75 inches of space, which is usually not enough to get a good night’s sleep.

In the 1870s, when American furniture makers standardized the size of double beds, the name “full” became popular. In the United States, a twin bed became the standard size for a single bed, and a full mattress became the standard size for a double bed.

What is a Full-Size Mattress?

A double bed is the same as a full-size mattress. Most college dorms have full-size beds. They also work well in small rooms or studio apartments where space is limited.

A room that is 10 feet by 10 feet is best for a full bed. When setting up your bed, think about how much space you’ll need for other furniture and to move around. On all sides of the bed except the one against the wall, you should leave at least 2 to 3 feet of space.

Different Kinds of Full-Size Mattresses

Most mattress stores and websites don’t carry double XL or full XL sizes. If you want a full XL mattress, you should look into the brands that make them before you go to a store or shop online. Since these sizes don’t come up very often, it might be hard to find bedding accessories that fit.

Other Standard Sizes

A double or full-size bed is wider than a twin and twin XL and narrower than a king, queen, or California king. If a double or full-size mattress doesn’t work for you, you might want to look into other standard mattress sizes.

Twin Size Mattress

A twin mattress is 38 inches wide and 75 inches long. It is small, which makes it a good choice for kids’ rooms. Single adults may sometimes sleep on a twin mattress, but there isn’t much room to stretch out and relax on it. You can use twin beds as bunk beds to make the most of a small space.


A full-size mattress is the same size as a double mattress. Are you unsure of the appropriate measurement? Not only are you not alone, but you’re not the only one. Even if you’re familiar with mattress sizing concepts, the variety of bed sizes might be difficult to navigate when shopping for a new mattress. Knowing the dimensions of a standard-sized bed’s mattress can assist you in making the best decision for your specific needs.