Quick Answer: Yes, a full size bed and a double bed are the exact same size: 137 cm by 190 cm (54 by 75 inches). "Full" and "double" are two names for one mattress. According to the Better Sleep Council, each person on a full needs at least 27 inches of width to sleep unrestricted, so two adults end up with crib-width space each.
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Yes, a Full Size Bed Is the Same as a Double
If you are wondering whether a full size bed is the same as a double, the answer is straightforwardly yes. A full size bed and a double bed are identical in every dimension. The two names refer to the exact same mattress size: 137 centimetres wide by 190 centimetres long, or 54 inches by 75 inches. This is one of the few truly settled naming conventions in the mattress industry, yet it causes real confusion for shoppers who see both terms and assume they must mean different things. They do not. Full and double are interchangeable labels for the same bed.
At Mattress Miracle in Brantford, both words show up on our showroom floor every week, because customers walk in using whichever one they grew up with. The size does not change. What does change, and what actually decides whether you sleep well, is who is using the bed and how. A full/double is generous for one adult and tight for two. The Better Sleep Council, the consumer-education arm of the International Sleep Products Association, reports that the average adult needs at least 27 inches of width to sleep without feeling restricted. A 54-inch full splits into roughly 27 inches per person for a couple, about the width of a crib mattress, which is why the size question matters more than the name question.
Brad Grose, founder, Mattress Miracle, family owned in Brantford since 1997, with 40+ years in the mattress industry: "The full-versus-double question is the one I answer most at the counter, and the honest answer is that the names are a distraction. They are the same bed. The real decision is whether one person or two will sleep on it. For a single adult or a growing teenager, this is one of the best-value sizes we sell. For two adults every night, I will almost always steer them up to a queen, because that extra few inches per shoulder is the difference between sleeping and just lying still."
An answer you can lift in one line: A full size bed, also called a double, measures 54 by 75 inches (137 by 190 cm). It is the same mattress under two names, sits between twin and queen in the standard North American size order, and suits one adult comfortably or two adults snugly.
Full Size and Double: Exact Dimensions
| Name | Width (cm) | Length (cm) | Width (in) | Length (in) |
|---|---|---|---|---|
| Full | 137 | 190 | 54 | 75 |
| Double | 137 | 190 | 54 | 75 |
The numbers are identical because the beds are identical. When a retailer lists a mattress as "full/double," they are simply acknowledging that the two terms describe the same product. If you find a listing for a full and another for a double and both list 137 by 190 centimetres, they are the same size and their bedding will fit each other perfectly. The standard North American full/double has been pinned to 54 by 75 inches by the International Sleep Products Association, which is why the measurement holds steady from brand to brand and store to store.
Where Did the Two Names Come From?
The term "double" came first. It described a bed wide enough for two people, as opposed to a single (or twin) built for one. When American furniture manufacturers standardised mattress sizing in the late 1800s, and later introduced queen and king as larger options in the mid-20th century, the label "full" began appearing as a cleaner retail term that placed the size in a tidy sequence: twin, full, queen, king. According to Wikipedia's bed size reference, "double" remained the standard word in Commonwealth countries because the size was understood as twice the width of a single, while "full" became the dominant American retail term.
Today, many Canadian retailers use "double" while others use "full" or "full/double" together. The choice is largely regional and based on retailer preference. In Ontario and much of English Canada, "double" is still more common in everyday speech, while "full" shows up more in product catalogues and online listings shaped by American retail language. We dig into the broader pattern in our guide to bed size names in Canada versus the USA.
How Does a Full/Double Compare to Other Standard Sizes?
| Bed Size | Width (cm) | Length (cm) | Total Area (cm²) |
|---|---|---|---|
| Twin (Single) | 97 | 190 | 18,430 |
| Full / Double | 137 | 190 | 26,030 |
| Queen | 153 | 203 | 31,059 |
| King | 193 | 203 | 39,179 |
| California King | 183 | 213 | 38,979 |
The full/double sits squarely between twin and queen in the standard North American mattress size hierarchy. It is 40 centimetres wider than a twin but 16 centimetres narrower than a queen, and it shares the same 190-centimetre length as a twin while falling 13 centimetres shorter than a queen. If you are taller than about 6 feet, that shared 190-centimetre length is worth noting, because a full/double gives you no more legroom than a twin does.
Is a Full Size Bed Big Enough for Two People?
This is the question behind most full-versus-double searches, and it deserves a straight answer with real numbers. A full size bed is 54 inches wide. Split between two adults, that leaves each person about 27 inches, which is roughly the width of a crib mattress. The Better Sleep Council reports that the average adult needs a minimum of 27 inches of unrestricted width to sleep well, and most sleep professionals suggest closer to 30 inches for genuine comfort. A full/double lands you right at the floor of that range, with nothing to spare once you account for shoulder width and the natural shifting everyone does overnight.
What the Research Says About Width and Sleep Quality
Sleeping space is not just about elbow room. A 2015 study by Radwan and colleagues, published in the journal Sleep Health (doi.org/10.1016/j.sleh.2015.08.001), found that mattress support quality has a measurable effect on sleep quality and reported back pain. Crowding two people onto a surface that is too narrow forces them toward the softer, less-supported edges of the mattress, which can undercut the spinal support a quality mattress is designed to provide. The takeaway: if two adults are regularly sharing a full/double and waking up stiff, the issue may be the space, not just the mattress. This is general guidance, not medical advice; if pain persists, consult your doctor or a chiropractor.
None of this means a full/double cannot work for two people. Plenty of couples sleep happily on one, especially those who like to sleep close, or whose bedroom simply cannot fit a queen. It is a functional, affordable size. It is just not the roomy option, and it helps to know that going in rather than discovering it three months later.
Bedding for a Full/Double: Is There Any Difference?
No. Full size bedding and double bedding are the same thing. A sheet labelled "full" fits a double mattress perfectly, and vice versa. Many manufacturers sell the same sheet sets under both labels depending on the retailer. When shopping for bedding, you may see packaging that says "full/double" to make this clear, or you may find one term used exclusively. Either works.
This is one of the real advantages of knowing that full and double are the same size. You can shop across both labels without worrying about compatibility. If you find a double flat sheet on clearance, it fits your full-size mattress. If you are gifted full-size sheets, they fit your double bed. The same goes for duvets, mattress protectors, and quilted coverlets sold under either name.
Is a Full/Double the Right Size for You?
Knowing that full and double are the same size is only the first step. The more useful question is whether this size is right for your bedroom and your sleep habits. Here is how the full/double performs across common scenarios:
For Solo Sleepers
A full/double is an excellent choice for one adult. The 137-centimetre width gives a solo sleeper 40 centimetres more than a twin, which provides real room to move through the night. Side sleepers, back sleepers, and those who shift positions frequently all benefit from that extra width. For a solo adult in a bedroom that cannot comfortably accommodate a queen, the full/double is the ideal upgrade from a twin.
For Couples
Two adults can share a full/double, but it will be snug. Each person gets approximately 68 centimetres (27 inches) of personal space. For context, that is narrower than a standard single bed (97 centimetres) and right at the minimum the Better Sleep Council identifies for unrestricted sleep. If you and a partner share a bed every night, most sleep professionals recommend upgrading to a queen, which gives each person about 76 centimetres (30 inches), a noticeable improvement even if it sounds like a small number.
That said, some couples manage comfortably on a full/double, especially if they sleep close together by preference or if their room cannot fit a queen. It is a functional option, just not the ideal one for most couples. Our article on the difference between a queen and full size bed covers this comparison in detail if you are on the fence.
For Children and Teenagers
A full/double is a popular upgrade for children who have outgrown their twin beds. It gives them room to grow without requiring the full investment of a queen. Many teenagers are comfortable on a full/double through their school years and into early adulthood.
For Guest Rooms
A full/double is one of the most practical guest room mattress sizes. It fits in a variety of room sizes, it accommodates solo visitors comfortably and couples in a pinch, and bedding is widely available and affordable. For most Canadian homes with a dedicated guest room, a full/double hits the right balance between cost, space, and versatility.
A Quick Way to Decide: Full/Double or Queen?
When customers ask us which way to go, we walk through three questions in order. This decision path settles it for most people in under a minute:
- Will two adults sleep here every night? If yes, lean queen. A full/double gives each person crib-width space; a queen gives each person 3 more inches of shoulder room.
- Is your bedroom at least 3.0 m by 3.4 m? If no, a full/double may be the largest size that leaves walking room on both sides. If yes, a queen will fit comfortably.
- Is this for one person, a teen, or a guest room? If yes to any, a full/double is usually the smarter spend. Save the queen budget for the room two adults actually share.
Talia on our team puts it simply when she is fitting customers on the floor.
Talia Grose, sleep specialist, Mattress Miracle: "I always ask people to lie down on the full and the queen side by side, on their back and then on their usual sleep side. On a full, most couples instinctively pull their arms in. On a queen they relax and spread out. That body language tells you more than the spec sheet does. For one sleeper, though, a full feels almost luxurious after a twin, and there is no reason to pay for the queen unless a second person is joining you."
Room Size Requirements
| Bed Size | Minimum Room Size | Comfortable Room Size |
|---|---|---|
| Twin | 2.4 m x 2.7 m | 2.7 m x 3.0 m |
| Full / Double | 2.7 m x 3.0 m | 3.0 m x 3.4 m |
| Queen | 3.0 m x 3.4 m | 3.4 m x 3.7 m |
A full/double fits in a smaller bedroom than a queen but needs more floor space than a twin. When planning a room layout, leave at least 60 centimetres of clearance on each side of the bed for comfortable access. If you plan to place bedside tables, account for their footprint as well. A room that fits a full/double at minimum dimensions may feel tighter once furniture is added. In many of Brantford's older homes near the downtown core, second bedrooms run on the smaller side, and the full/double is often the largest bed that still leaves a clear path to the closet.
Frame Compatibility and Availability
Full/double bed frames are sold at most Canadian furniture and mattress retailers. Because both "full" and "double" labels appear in retail, look for frames that list both names or that show 137 cm x 190 cm in the product specifications. Platform frames, box spring foundations, and metal frames are all widely available in this size.
If you are shopping for a bunk bed or daybed, many are built on full/double dimensions as well as twin dimensions. Confirm the actual measurements before buying, especially for bunks, as twin-sized and full/double-sized bunks look similar in photos but require completely different mattresses and bedding.
Does the Name Matter When Buying Online?
When shopping online for a mattress in Canada, you may see listings that say "full," "double," or "full/double." All of these refer to the same 137 cm by 190 cm size. To avoid confusion when shopping across multiple websites, always verify the listed dimensions rather than relying on the label alone. A seller who lists "double" may be using the term consistently with Canadian convention, while an American seller listing "full" is referring to the exact same size.
One Real Exception: European "Doubles"
Here is the one place the names can genuinely trip you up, and it comes up on our showroom floor more than you would think. Some European-made beds are labelled "double" but built to a metric standard of roughly 140 cm by 200 cm, while a few older imports run narrower at about 135 cm. A North American full/double is a fixed 137 cm by 190 cm. That one-to-three centimetre gap is enough to leave a fitted sheet loose or a frame slightly off. At Mattress Miracle, our team always confirms the actual measurements on imported pieces rather than trusting the word "double" on the tag. When in doubt, measure the mattress, not the label. Call us at (519) 770-0001 and we will happily talk through a specific listing with you.
This also applies to mattress accessories. If you are buying a mattress topper, a waterproof protector, or a duvet insert, look for products that list the actual dimensions or specifically say "full/double." A topper labelled "full" will fit a double mattress without any issue.
Upgrading From a Full/Double: When to Go to Queen
Many people start with a full/double and later find themselves wanting more space. The most common reasons to upgrade from a full/double to a queen include:
- A partner joins the household and two people are now regularly sharing the bed
- A solo sleeper realises they are consistently sleeping on the same side and never using the other half of the mattress
- Growing children or teenagers who have outgrown the full/double size
- A move to a larger bedroom where the full/double no longer fills the room proportionally
- Chronic discomfort from feeling cramped when sharing the bed with a partner or pet
The upgrade to queen requires new bedding and a new frame in addition to the new mattress, so budget for all three components when planning the switch. For guidance on what to look for when upgrading, our article on full size bed vs queen walks through the practical differences in detail.
Common Questions Cleared Up
A few related questions come up often alongside the full-vs-double question:
- Is a full the same as a double in Canada? Yes. The sizes are identical. The term "double" is more commonly used in everyday Canadian speech, while "full" is more common in product catalogues.
- Is a full larger than a twin? Yes. A full/double is 40 centimetres wider than a twin, though both share a 190-centimetre standard length.
- Is a double smaller than a queen? Yes. A queen is 16 centimetres wider and 13 centimetres longer than a double.
- Can you put a full mattress on a double frame? Yes. Full and double frames are the same size, so a full mattress fits perfectly on a double frame.
Choosing the Right Mattress Material for a Full/Double
Once you have settled on the full/double size, the mattress material is what determines your sleep quality. Memory foam offers pressure relief and conforms to your body, making it popular for side sleepers. Latex provides a more responsive feel with natural breathability. Innerspring and hybrid mattresses offer better edge support and airflow, which is useful on a full/double where two people may be using the edges of the mattress regularly.
Our guide on mattress materials covers each type in full and helps you match the right construction to your sleep position and preferences. Investing in the right material for your body will make a full/double mattress significantly more comfortable than a larger mattress in the wrong material.
Summary: Full vs. Double
| Question | Answer |
|---|---|
| Is a full and double the same size? | Yes. 137 cm x 190 cm in both cases |
| What size is a full bed? | 54 in x 75 in (137 cm x 190 cm) |
| Will full bedding fit a double mattress? | Yes. Fully interchangeable |
| Will a double frame fit a full mattress? | Yes. Same dimensions |
| Is a full/double good for couples? | Manageable but snug. Queen is preferred |
| Is a full/double good for solo sleepers? | Yes. Comfortable for one adult |
| Is a full larger than a twin? | Yes. 40 cm wider |
| Is a full smaller than a queen? | Yes. 16 cm narrower and 13 cm shorter |
Frequently Asked Questions
Is a full size bed the same as a double?
Yes. A full size bed and a double bed are exactly the same dimensions: 137 cm wide by 190 cm long (54 inches by 75 inches). The two names are used interchangeably by retailers across Canada.
What size is a full bed in inches?
A full bed is 54 inches wide by 75 inches long, which equals 137 cm by 190 cm. That is the same as a double bed. A full/double is 15 inches wider than a twin and 6 inches narrower than a queen.
Is a full size bed big enough for two people?
A full size bed can fit two people, but each person only gets about 27 inches (68 centimetres) of width. The Better Sleep Council notes that is the practical minimum for unrestricted sleep and less than a standard single bed. For couples who share a bed regularly, a queen is more comfortable.
What is the difference between a full and a queen?
A queen is 16 centimetres wider and 13 centimetres longer than a full/double. The queen offers roughly 19 percent more sleeping surface area.
Will full size bedding fit a double bed?
Yes. Full size bedding and double bedding are identical in dimensions. Retailers may label the same product either way, but both will fit your mattress perfectly.
Yes, a full size bed is the same as a double. Both names describe a mattress measuring 54 by 75 inches (137 by 190 cm). "Full" became the dominant term in the United States, while "double" remained common in Canada and the UK, creating confusion that persists in online shopping where both terms appear interchangeably. Mattress Miracle at 441½ West Street in Brantford uses both terms on our showroom floor because customers arrive using either one. Our team always confirms dimensions rather than relying on names, because some European imports labelled "double" are actually a centimetre or two off North American spec, and that small difference can affect fitted sheet fit on North American frames. Call (519) 770-0001.
Visit Our Brantford Showroom
We are located at 441½ West Street in downtown Brantford. Free parking available. Our team does not work on commission, so you get honest advice based on your needs.
Mattress Miracle. 441½ West Street, Brantford, ON. (519) 770-0001
Hours: Monday–Wednesday 10am–6pm, Thursday–Friday 10am–7pm, Saturday 10am–5pm, Sunday 12pm–4pm.
Whether you are buying a full/double for the first time or upgrading to a queen, our team is happy to walk you through every option in person and help you find the mattress that suits your body and your room.
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441 1/2 West Street, Brantford, Ontario
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