Guide to Mattress and Bed Dimensions

Bed dimensions are one of the most important considerations when shopping for a new mattress. When buying a mattress, make sure you determine the actual size of the set, as opposed to its name brand or descriptive name. It is also important to keep in mind that sizes are not always universal. Knowing your bed and mattress size is essential when purchasing a new mattress, or making a frame to fit your existing bed. This is why it is highly advised for people to measure their own custom mattresses before making any purchases.

Twin Size

The twin bed is the smallest of the three standard bed sizes. It is typically used for children and those who are shorter than average. It is also commonly used in college dorms, where space is at a premium. While they are most commonly made with a single mattress, they can also be purchased with two twin mattresses instead. This allows you to create a bunk bed out of them. Twin beds are available in both standard and extra-long sizes, with the extra-long being used by taller individuals or those who like more space to stretch out.

Twin XL Size

The extra-long twin mattress is exactly what it sounds like: an extra-long version of a regular twin mattress. The extra-long version has several names, including “California king” and “Eastern king” depending on where it was manufactured or sold. These custom mattresses measure 74 inches wide by 80 inches long — about 5 feet wide by 6 feet long — and are usually about 16 inches deep when compressed for shipping purposes (though some manufacturers may compress them more). They are designed for tall people who want more room to stretch out when sleeping or sitting up in bed; however, many people use them as additional seating during parties.

Full Size

The full-size mattress is the most popular size in the United States, Canada, and many other parts of the world. It is also known as a double mattress or double bed and measures approximately 54″ wide by 75″ long. This mattress size is ideal for children, teenagers, and adults who are looking for a small-sized bed that can fit into a smaller bedroom or apartment.

Queen Size

The queen mattress is the most common size in the United States. It measures 60 inches wide and 80 inches long. The queen mattress is designed to fit a standard twin-size box spring and mattress set. This is an ideal size for couples who are looking for a larger bed without having to purchase two full-size mattresses.

King Size

The king-size mattress is even larger than the queen, measuring 78 inches wide and 80 inches long. The king-size mattress is designed to fit a standard king-size box spring and mattress set. King-sized mattresses are ideal for couples or families who want the room to stretch out or roll over during the night without having to worry about disturbing their partner or children sleeping next door or down the hall!


While the mattress sizes above cover the vast majority of mattress sizes, there are still some mattresses that do not fit within these standard sizes. When shopping for a new mattress, it’s best to know your exact specifications to determine which size mattress will provide you with the most comfort and support.

Ubaid Soomro
Ubaid Soomro
Ubaid is a freelance writer, with 3 years of experience under his Belt. He writes and publishes articles on lots of high-quality Tech, General, and Health sites. When not writing, he enjoys traveling and adventure. Say hi on Skype ID