What’s A Full Size Mattress

If you’re shopping for a new bed, you’ve probably asked yourself, what’s a full size mattress? It’s one of the most common mattress sizes available, but it’s not always the best fit for everyone. This guide will explain everything you need to know about full size beds, from their dimensions to who they’re best for, so you can make a smart choice for your sleep and your space.

Let’s start with the basic facts. A full size mattress, sometimes still called a “double” mattress, measures 54 inches wide by 75 inches long. That gives you 27 inches of width per person if two people are sharing, which is just 5 inches more than a twin bed offers for a single sleeper. Its length is the same as a twin, so it might not be suitable for taller adults who need more legroom.

Full Size Mattress Dimensions in Detail

Knowing the exact size is crucial for fitting sheets and your bedroom layout. Here are the precise dimensions:

Width: 54 inches (4 feet 6 inches)
Length: 75 inches (6 feet 3 inches)
Surface Area: 4,050 square inches (28.125 square feet)
Compared to a Queen: A queen mattress is 60″ x 80″, giving you 6 more inches in width and 5 more inches in length.

Always remember that these are standard dimensions. The actual size can vary slightly by manufacturer, sometimes by up to an inch. It’s a good idea to measure before you buy, especially if you have an old bed frame or tight space.

Who is a Full Size Mattress Best For?

A full bed isn’t a one-size-fits-all solution. It shines in specific situations. Consider a full if you fit into one of these categories:

Single Adults: It’s an excellent upgrade from a twin for a solo sleeper who wants more room to spread out.
Teenagers: The extra width over a twin is perfect for growing teens, and it can last them through college years.
Guest Rooms: It’s a space-efficient size for a guest room that can still comfortable accommodate most adult guests.
Smaller Primary Bedrooms: If your bedroom is compact (under 10′ x 10′), a full bed leaves more walking space than a queen or king.
Budget-Conscious Shoppers: Full mattresses and their bedding are often less expensive than larger sizes.

However, it’s generally not recommended for couples on a regular basis. The 27 inches per person can feel quite cramped, leading to disturbed sleep if one partner moves frequently.

Pros and Cons of a Full Size Mattress

Weighing the good and the not-so-good will help you decide.

Advantages

Space-Saving: Fits well in smaller apartments and bedrooms where every inch counts.
Cost-Effective: Usually cheaper than queen or king sizes, both for the mattress and for sheets/comforters.
Versatile: Works great for kids transitioning from a twin, solo sleepers, and guest rooms.
Easier to Move: Lighter and more maneuverable than larger mattresses, which is helpful for stairs or tight hallways.

Disadvantages

Cozy for Couples: It’s quite narrow for two adults to share comfortably long-term.
Length Can Be Short: At 75 inches, adults over 6 feet tall may find their feet hanging off the edge.
Limited Selection: Some premium or newer mattress models might not be offered in full size, focusing on queen and king.
Bedding Challenges: While common, stylish bedding options can sometimes be more limited compared to queen sizes.

Full vs. Other Standard Mattress Sizes

Context is key. Here’s how a full stacks up against other common sizes.

Full vs. Twin

A twin mattress is 38″ x 75″. A full gives you 16 extra inches of width, which is a significant upgrade for a single sleeper. It’s the logical next step for a child or teen who has outgrown there twin bed.

Full vs. Queen

This is a common dilemma. A queen (60″ x 80″) provides substantially more room for either a single sleeper or a couple. The choice here depends on your room size and sleeping needs. If your bedroom can fit it, a queen is often the better long-term investment for adults.

Full vs. Full XL

A Full XL mattress is less common but solves the length issue. It is 54″ wide by 80″ long—the same length as a queen. This is a fantastic option for taller single sleepers who don’t need the extra width of a queen.

How to Choose the Right Full Size Mattress

Once you’ve decided on the size, you need to pick the specific mattress. Follow these steps.

Determine Your Budget: Set a realistic range. Prices vary widely based on material and brand.
Identify Your Sleep Position: Side sleepers usually need more cushioning for hips and shoulders. Stomach and back sleepers often need firmer support.
Consider Material:
- Innerspring: Traditional, bouncy feel, good airflow.
- Memory Foam: Contours to the body, relieves pressure points, minimizes motion transfer.
- Latex: Responsive, durable, and naturally cooling.
- Hybrid: Combines coils with foam layers for a balance of support and comfort.
Check Firmness Level: Most mattresses are rated on a scale from 1 (very soft) to 10 (very firm). Medium-firm (around 6-7) is a popular choice that works for many.
Read Reviews and Policies: Look for verified customer reviews. Always check the trial period, warranty, and return policy before buying.

Setting Up Your Full Size Bed: Frames and Bedding

You’ve got the mattress. Now you need the right support and sheets.

Choosing a Bed Frame or Foundation

A proper foundation is essential for warranty and support. Options include:

Box Spring: The traditional choice for innerspring mattresses, but not always needed for foam beds.
Platform Bed: Has a slatted or solid surface that supports the mattress directly, no box spring needed.
Adjustable Base: Allows you to elevate your head or feet, great for reading or reducing snoring.
Bunkie Board: A thin, solid platform used on top of a bed frame to provide a flat, even surface.

Ensure any frame or foundation you choose is designed for a full size mattress and can adequtely support its weight.

Buying Sheets and Bedding

You’ll need bedding specifically labeled “Full” or “Double.” Standard dimensions are:

Fitted Sheet: Should be 54″ x 75″. Deep-pocket sheets are availible for thicker mattresses.
Flat Sheet: Typically around 81″ x 96″.
Comforter/Duvet: Common sizes are 80″ x 90″ or 86″ x 86″.
Mattress Protector: A must-have to guard against spills, allergens, and wear. Get one that fits a 54″ x 75″ mattress.

Common Mistakes to Avoid When Buying

A little caution can save you from a big headache.

Not Measuring Your Room: Use painter’s tape to map out the mattress and frame size on your floor. Remember to leave space for doors to open and walkways (at least 2 feet on each side).
Ignoring Your Partner’s Needs: If sharing, both should test the mattress. A full might be to small, making a queen a wiser choice.
Forgetting About Future Needs: Will your situation change in a few years? A teen might need more room, or you might move to a larger bedroom.
Choosing Based on Price Alone: The cheapest option isn’t always the most comfortable or durable. Think of a mattress as a long-term investment in your health.
Overlooking the Return Policy: Even the best-sounding mattress might not work for you. A risk-free trial period is invaluable.

FAQs About Full Size Mattresses

Is a full size mattress good for two people?

It can work for two people in a pinch, like for short-term guests or if space is extremely limited. However, for two adults sleeping together every night, it’s quite narrow. Each person gets only about 27 inches of width, which is less than a crib mattress. Most couples will be significantly more comfortable in a queen or king size bed.

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

There is no difference. “Full” and “double” are two names for the exact same mattress size (54″ x 75″). The term “double” is used less often now, but you might still see it on some product labels or from older manufacturers.

How much does a full size mattress cost?

Prices vary dramatically. You can find basic full mattresses for under $300, while high-end models can cost over $1,500. On average, a good quality full mattress from a reputable brand often falls in the $600 to $1,200 range. The price depends on materials, construction, and brand reputation.

Can a tall person fit on a full bed?

It depends on your height. A standard full is 75 inches long (6’3″). If you are taller than 6 feet, your feet may hang off the end, or you may have to sleep diagonally. For taller individuals, a Full XL (54″ x 80″) or a queen size (60″ x 80″) is a much better option for ensuring proper full-body support.

What size room fits a full bed best?

A full bed fits comfortably in a bedroom that is at least 10 feet by 10 feet. This allows for the bed itself and leaves enough room for a small dresser and walking space. In a room smaller than that, it can feel cramped, but it’s still a better choice than a larger mattress that would overwhelm the space.

Do all mattress types come in full size?

Most do, but not always. While innerspring, memory foam, latex, and hybrid mattresses are widely available in full size, some specialized or direct-to-consumer brands might limit their offerings to only queen and king to simplify inventory. It’s always best to check the brand’s website or ask the retailer.

Caring for Your Full Size Mattress

Proper care extends its life and keeps it clean. Follow these simple tips:

Use a Protector: This is your first line of defense against spills, stains, dust mites, and allergens. Wash it regularly.
Rotate Regularly: Every 3-6 months, rotate your mattress 180 degrees (head to foot). This prevents uneven wear and sagging. Some models also recommend flipping; check your warranty.
Clean Spills Immediately: Blot liquids with a clean cloth. Use a mild soap with cold water for stains—never soak the mattress.
Vacuum Occasionally: Use an upholstery attachment to remove dust and debris from the surface.
Provide Proper Support: Ensure your bed frame or foundation is sturdy and doesn’t have broken slats, which can damage the mattress.
Avoid Jumping: This seems obvious, but it can damage the internal supports, especially in kids’ rooms.

Choosing a mattress is a big decision. Now that you know the answer to “what’s a full size mattress,” you can see it’s a versatile and practical option for many people. It offers a great balance between personal space and room footprint, often at a friendly price point. By considering your own height, sleeping habits, and room dimensions, you can confidently decide if a full size bed is the perfect fit for your next chapter of restful sleep. Remember to take your time, test if possible, and prioritize quality support for your body.