What’s The Size Of Full Mattress

If you’re shopping for a new bed, you might be asking, what’s the size of full mattress? It’s a common question, as this size is a popular choice for many. A full mattress, also sometimes called a double mattress, offers a good balance between space and room footprint. It’s wider than a twin but more compact than a queen, making it versatile for single sleepers, teens, and certain couples.

This guide will give you all the details you need. We’ll cover the exact dimensions, who it’s best for, and how it compares to other sizes. You’ll also get tips on choosing bedding and a bed frame. Let’s get started with the basic numbers.

The standard dimensions for a full-size mattress in the United States are 54 inches wide by 75 inches long. In metric measurements, that’s approximately 137 cm wide by 191 cm long. This gives you a total sleeping surface of 4,050 square inches.

It’s important to remember that these are the measurements for the mattress itself. The overall footprint of your bed will be larger once you add a bed frame and headboard. Always measure your room space carefully before you buy.

Who is a Full Mattress Best For?

A full mattress is a fantastic option for specific sleepers and situations. It’s not a one-size-fits-all solution, but it can be perfect for the right person.

Single Adults: For one person who likes to spread out, a full offers 27 more inches of width than a twin. It provides ample room for a restful night’s sleep.
Teenagers: As kids grow, a full mattress is a great upgrade from a twin. It gives them extra space for growth and is suitable through the teen years.
Guest Rooms: A full bed is a space-efficient choice for a guest room. It can comfortably accommodate one adult or two children during sleepovers.
Couples on a Budget or in Smaller Rooms: While a queen is typically recommended for couples, a full can work for those who sleep close together or have a very limited bedroom space. Just be aware each person gets only 27 inches of width, which is less than a crib.
College Students: In dorm rooms or small apartments, a full mattress can maximize sleeping area without overwhelming the limited floor space.

Full vs. Other Mattress Sizes

To truly understand the full mattress, you need to see how it stacks up against other common sizes. This comparison will help you make the best decision for your needs.

Full vs. Twin

A twin mattress is 38″ x 75″. The full is 16 inches wider, offering significantly more sleeping space for a single sleeper. The length is the same. If you have the room, choosing a full over a twin is usually a better long-term investment for an adult or teenager.

Full vs. Queen

A queen mattress is 60″ x 80″. This is 6 inches wider and 5 inches longer than a full. The queen is the most popular size for couples because it provides more personal sleeping space for each person. If your bedroom can fit a queen, it’s often the more comfortable choice for two people.

Full vs. Double

This one is simple: “full” and “double” refer to the exact same mattress size. The term “double” is a bit older, but you’ll still see it used. There is no difference in dimensions.

Choosing the Right Bed Frame and Foundation

Your mattress needs proper support. The right foundation is crucial for comfort, durability, and safety. Here are the main options for a full-size mattress.

Box Spring: A traditional choice that sits on a metal frame. It provides a slight bounce and elevates the bed height. Ensure you get a “full” or “double” size box spring.
Platform Bed: These frames have a solid or slatted surface that supports the mattress directly, no box spring needed. They offer a modern look and often include storage drawers.
Adjustable Base: An electric base that allows you to elevate your head or feet. Perfect for reading, watching TV, or addressing issues like snoring or acid reflux. Confirm the base is designed for a full mattress.
Metal Frame: A simple, affordable frame that holds a box spring and mattress. Often called a “bedstead,” it’s a no-frills option that gets the job done.

Always check the manufacturer’s warranty guidelines. Some mattresses, like memory foam or latex, may require specific types of support (like solid or closely-spaced slats) to keep the warranty valid.

Bedding and Sheets for a Full Mattress

You’ll need sheets and bedding specifically labeled “Full” or “Double.” Using the wrong size will lead to ill-fitting sheets that come off at night.

A standard full sheet set typically includes:

One fitted sheet (54″ x 75″)
One flat sheet (usually around 81″ x 96″)
One or two pillowcases (standard size)

For comforters, duvets, and mattress protectors, always double-check the product dimensions. Some “Full/Queen” combo sizes exist, but they can be too large for a full bed and drape too much. A dedicated full size is usually the neatest fit.

Measuring Your Room for a Full Bed

Before you buy, it’s essential to make sure the bed will fit comfortably in your room. You need space to walk around and for other furniture. Follow these steps:

Measure Your Room: Get the length and width of the floor space. Note the locations of doors, windows, and closets that swing open.
Account for the Entire Bed: Remember, a full mattress is 54″x75″. Add at least 2-6 inches on each side for the bed frame. A typical full platform bed might have a total footprint of around 57″ x 79″.
Plan for Walkways: Experts recommend at least 24 inches of walking space on at least two sides of the bed, preferably the sides and the foot. This makes the room feel functional and not cramped.
Use Painter’s Tape: The best trick is to mark out the exact dimensions on your floor with painter’s tape. This gives you a visual sense of how the bed will fill the space and where you can place other items like a dresser or nightstands.

Pros and Cons of a Full Mattress

Let’s break down the advantages and potential drawbacks to help you decide.

Pros:

More Space than a Twin: Offers a significant upgrade in comfort for single sleepers without taking up to much floor space.
Fits in Smaller Rooms: Ideal for apartments, dorm rooms, or compact guest bedrooms where a queen would feel overwhelming.
Cost-Effective: Usually less expensive than queen or king mattresses, bedding, and frames.
Great for Growing Kids: The perfect long-term size for a child’s transition from a twin.

Cons:

Cozy for Two Adults: At only 54 inches wide, each person in a couple gets just 27 inches. This can lead to disturbed sleep if either person moves a lot.
Shorter Length: At 75 inches long, it may be to short for taller individuals (over 6 feet tall). They might want to consider a “Full XL” (54″ x 80″) if they can find one.
Less Bedding Variety: While still common, you might find slightly fewer style options in full size compared to queen or king for things like specialty bed frames or headboards.

Special Considerations: Full XL and Split Full

There are a couple of less common variations on the full size that you might encounter.

Full XL: This size is 54 inches wide by 80 inches long. The extra 5 inches in length makes it a good choice for taller single sleepers. It’s often used in college dormitories and some residential settings. Bedding for Full XL can be harder to find.

Split Full: This refers to two separate mattresses, each 27″ x 75″, that sit side-by-side on a split bed frame to create the dimensions of a standard full. It’s primarily used for adjustable beds, allowing each sleeper to control their own side independently. It’s not a common choice for a standard bed setup.

Making the Final Decision

Choosing a mattress is a personal decision. Ask yourself these final questions:

Who is the primary sleeper? (One adult, a couple, a teenager?)
What is the size of your bedroom? Have you taped out the dimensions on the floor?
What is your budget? Consider the total cost of mattress, frame, and new bedding.
How long do you plan to keep the mattress? For a child, a full can be a long-term solution. For a couple, it might be a temporary choice.

If you’re still unsure between a full and a queen, err on the side of more space if your room allows it. Most people never regret getting a larger mattress, but they often regret getting one that feels to small.

FAQ Section

How big is a full size mattress?

A full size mattress is 54 inches wide and 75 inches long (137 cm x 191 cm).

Is a full mattress big enough for two people?

It can work for two people who sleep very close together and don’t move much. However, it provides only 27 inches of width per person, which is quite narrow. Most couples are more comfortable on a queen (60″ wide) or king mattress.

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

There is no difference. “Full” and “double” refer to the exact same mattress size. The terms are used interchangeably.

What size sheets fit a full mattress?

You need sheets specifically labeled “Full” or “Double.” The fitted sheet should be 54″ x 75″. Using queen sheets will result in a loose, ill-fitting cover that may not stay on.

How much room do I need for a full bed?

Beyond the mattress, remember to add the width of the bed frame. Aim for a room that is at least 10 feet by 10 feet to comfortably fit a full bed along with other furniture like a dresser and nightstands, while maintaining clear walkways.

Can a tall person sleep on a full mattress?

A standard full is 75 inches long. If you are over 6 feet 3 inches tall, your feet may hang off the end. A “Full XL” (54″ x 80″) would be a better option, though it’s less common.

Is a full mattress good for a teenager?

Yes, a full mattress is an excellent choice for a teenager. It provides plenty of room for growth and is a significant upgrade from a twin bed, offering more comfort for their changing needs.