If you’re shopping for a new bed, one of the first questions you’ll ask is, what’s the measurements on a full size mattress? Knowing the exact dimensions is crucial for fitting your space, choosing bedding, and ensuring a good night’s sleep. This guide will give you all the details you need, from standard sizes to practical buying tips.
A full size mattress, also sometimes called a “double,” is a popular choice for single adults, teenagers, and cozy couples. It offers more width than a twin but takes up less floor space than a queen. Let’s break down everything you need to know.
What’s The Measurements On A Full Size Mattress
The standard dimensions for a full size mattress in the United States are 54 inches wide by 75 inches long. In feet, that’s 4 feet 6 inches wide by 6 feet 3 inches long. In centimeters, it’s approximately 137 cm wide by 191 cm long.
These measurements are consistent across most mattress brands and retailers. However, it’s always smart to double-check the product specifications before you buy, especially for online orders. Some “European” or “specialty” full sizes might vary slightly.
Full Size Mattress Compared to Other Sizes
To really understand if a full is right for you, it helps to see it next to other common sizes.
- Twin (38″ x 75″): The full is 16 inches wider than a twin. It gives a single sleeper much more room to spread out.
- Twin XL (38″ x 80″): Same width as a twin but 5 inches longer. A full is wider but shorter than a Twin XL.
- Queen (60″ x 80″): The queen is 6 inches wider and 5 inches longer than a full. This extra space is often the deciding factor for couples.
- King (76″ x 80″): A king is significantly larger, offering 22 more inches of width and 5 more inches of length than a full.
- California King (72″ x 84″): This size is narrower but longer than a standard king, making it much larger than a full in every direction except width compared to a king.
Who is a Full Size Mattress Best For?
A full size bed isn’t a one-size-fits-all solution. It’s perfect for certain situations.
- Single Adults: Ideal for one person who appreciates extra sleeping space without dominating a room.
- Teenagers: Great upgrade from a twin as kids grow, offering space for them to stretch out.
- Guest Rooms: A versatile option that can accommodate most adult guests comfortably.
- Small Bedrooms: Fits well in apartments, dorms, or smaller rooms where a queen would feel cramped.
- Couples on a Budget or in Tight Spaces: While cozy, some couples find a full sufficient if they sleep close or have very limited room space.
When You Might Need a Bigger Size
Consider a queen or larger if:
- You are a couple and both of you move frequently during sleep.
- Either sleeper is taller than 6 feet. The 75-inch length may feel short.
- You share the bed with pets or children regularly.
- You simply prefer having ample personal space while you sleep.
Essential Bed Frame and Room Size Requirements
The mattress isn’t the only thing to measure. You need space for the bed frame and to walk around.
Bed Frame Dimensions: A full size bed frame or foundation will typically match the mattress dimensions (54″ x 75″). However, frames often have headboards, footboards, or side rails that add to the overall footprint. Always check the frame’s total dimensions.
Minimum Room Size: As a general rule, your bedroom should be at least 10 feet by 10 feet to comfortably fit a full bed. This allows for:
- The bed itself (4.5′ x 6.25′).
- Space for a nightstand on either side.
- About 2 feet of walking space on at least one side and at the foot of the bed.
In a smaller room, like a 9′ x 9′, a full can still work but might limit other furniture placement. It’s a good idea to tape out the dimensions on your floor with painter’s tape to visualize the fit.
Buying the Right Bedding for a Full Mattress
Using the correct sheets and blankets is key to comfort and safety. Standard bedding sizes are designed to match the mattress dimensions with a little extra for the depth.
- Fitted Sheet: Look for labels that say “Full” or “Double.” It should specify it fits a mattress up to a certain depth (e.g., 14″ deep pocket). Measure your mattress thickness first.
- Flat Sheet: A standard full flat sheet is usually around 81″ x 96″. This gives you enough overhang to tuck in.
- Comforter/Duvet: Full size comforters are typically 80″ to 86″ wide and 86″ to 88″ long. This ensures coverage over the sides.
- Mattress Protector: Ensure you get one labeled for a full size bed.
- Bed Skirt: If you use one, a full size is what you need.
A common mistake is accidentally buying queen bedding, which will be too large and look sloppy, or twin bedding, which will be to small and won’t stay on.
Step-by-Step Guide to Measuring Your Space
Before you purchase a full mattress, follow these steps to ensure it fits.
- Clear the Space: Move existing furniture out of the way to get an accurate sense of the empty floor.
- Measure the Room: Use a tape measure to find the length and width of the bedroom. Note the locations of doors, windows, closets, and vents.
- Tape it Out: Use painter’s tape to mark the exact rectangle of a full mattress (54″ x 75″) on the floor. Don’t forget to add extra inches for the bed frame’s design.
- Plan Furniture Layout: Place boxes or tape outlines where you want nightstands, a dresser, or a chair. Ensure there’s clear walking path.
- Check Doorways and Stairs: Measure all hallways, stairwells, and doorframes the mattress must travel through to reach the room. A full mattress can be tricky to maneuver in tight spaces.
Special Considerations and Variations
While 54″ x 75″ is the gold standard, be aware of these exceptions.
Full XL Mattress
Some manufacturers offer a “Full XL” size. This mattress is 54 inches wide (like a standard full) but 80 inches long (like a queen). It’s an excellent option for taller single sleepers who find the standard 75-inch length to short.
Older or Antique Full Beds
If you have an older bed frame or are using an antique, be cautious. Sizes weren’t always standardized. An older “double” bed frame might be slightly narrower or shorter. Always measure the interior dimensions of your old frame before buying a new mattress.
Adjustable Beds and Special Mattresses
If you’re buying a memory foam, latex, or adjustable bed base, the dimensions are almost always standard. However, some all-foam mattresses come compressed in a box and may take 24-48 hours to fully expand to their precise final dimensions.
Common Mistakes to Avoid When Choosing a Full Mattress
- Assuming It’s Right for All Couples: For two average-sized adults, a full offers only 27 inches of personal width each—less than a crib! It can feel restrictive.
- Ignoring Mattress Depth: Modern mattresses, especially pillow-tops, can be very thick (over 16″). This requires “deep pocket” sheets.
- Forgetting About Future Needs: If you plan to stay in the same home for years, consider if a queen would be a more flexible long-term investment.
- Not Laying on It: Always test the mattress in store if possible. Your comfort is just as important as the measurements.
FAQs About Full Size Mattresses
Is a full size mattress the same as a double?
Yes, in the United States, the terms “full” and “double” are used interchangeably to refer to a mattress that is 54 inches by 75 inches.
Can two adults comfortably sleep on a full bed?
It depends on the adults. It can work for couples who sleep close together and don’t move much. However, most couples find a queen size (which offers an extra 6 inches of width and 5 inches of length) to be a more comfortable long-term solution. For two adults, a full is often considered cozy at best.
What is the full size mattress dimensions in feet?
A full size mattress measures 4.5 feet wide by 6.25 feet long. This is helpful when planning room layout with other furniture measured in feet.
How much bigger is a queen than a full?
A queen mattress is 6 inches wider (60″ vs. 54″) and 5 inches longer (80″ vs. 75″) than a full. This provides a significant increase in total sleeping area.
What size headboard goes with a full mattress?
You need a headboard specifically designed for a full size bed. It will be built to match the 54-inch width of the mattress and frame. Using a headboard for a different size will not align correctly with your bed’s hardware.
Are full and double bed sheets the same?
Yes, sheets labeled “full” or “double” are made for the same standard mattress size. You can use them interchangably.
Making Your Final Decision
Choosing a mattress is a personal decision. Now that you know the answer to “what’s the measurements on a full size mattress,” you can weigh the pros and cons.
Think about your sleeping habits, your room size, your budget, and who will be using the bed. For a single sleeper in a modest room, a full is often the perfect balance of comfort and space efficiency. It provides ample room to stretch out without overwhelming the living area.
Remember to account for all costs: the mattress, a supportive foundation or bed frame, and the correct bedding. Investing in a quality mattress protector is also wise to safeguard your purchase. Take your time, do your measurements twice, and you’ll find the right bed for a great night’s sleep.