Quick Answer: A full size bed measures 137 cm wide by 191 cm long, which is 54 inches by 75 inches. In Canada this size is also called a double, and the two names refer to the same mattress. A bedroom of about 270 cm by 300 cm fits one comfortably.
The Bottom Line: Let's start with the precise numbers before moving into comparisons and room planning.
Full Size Bed Dimensions in cm at a Glance
The dimensions of a full size bed in cm are 137 cm wide by 191 cm long (54 inches by 75 inches). That single measurement answers the most common question shoppers ask when they are converting a mattress tag from inches or comparing sizes across different retailers. Understanding exactly what those centimetre numbers mean for your bedroom layout, your sleep posture, and your long-term comfort is where the real decision begins.
Full size beds are popular in Canada for guest rooms, teenager bedrooms, and compact primary suites. They offer noticeably more width than a twin yet stay narrow enough to fit in rooms where a queen would feel crowded. If you have ever laid a tape measure across a floor and wondered whether a full would actually work, this guide walks you through every dimension, comparison, and practical consideration you need.
Exact Full Size Mattress Measurements
Let's start with the precise numbers before moving into comparisons and room planning.
| Measurement | Inches | Centimetres | Metres |
|---|---|---|---|
| Width | 54 in | 137.2 cm | 1.37 m |
| Length | 75 in | 190.5 cm | 1.91 m |
| Surface area | 4,050 sq in | 26,126 sq cm | 2.61 sq m |
Most retailers and mattress manufacturers round these to 137 cm x 191 cm for simplicity. The tiny fractions (137.2 and 190.5) come from the direct conversion of 54 and 75 inches. When you are shopping for a bed frame, fitted sheet, or mattress protector, use 137 x 191 cm as your reference and confirm with the specific product listing.
Full Size vs. All Standard Canadian Mattress Sizes
Knowing the full size in isolation is only half the picture. Here is how it stacks up against every common mattress size sold in Canadian stores.
| Size Name | Width (cm) | Length (cm) | Width (in) | Length (in) |
|---|---|---|---|---|
| Twin (Single) | 99 cm | 191 cm | 38 in | 75 in |
| Twin XL | 99 cm | 203 cm | 38 in | 80 in |
| Full / Double | 137 cm | 191 cm | 54 in | 75 in |
| Queen | 153 cm | 203 cm | 60 in | 80 in |
| King | 193 cm | 203 cm | 76 in | 80 in |
| California King | 183 cm | 213 cm | 72 in | 84 in |
A few important observations jump out from this table. First, the full size shares its 191 cm length with the standard twin, making both sizes shorter than a queen, king, or California king. Adults taller than about 178 cm (5 feet 10 inches) may find their feet near the edge on a full. Second, the jump from full to queen adds 16 cm (about 6 inches) of width and 12 cm (about 5 inches) of length. That may not sound like much on paper, but it translates to a meaningfully larger sleeping surface for couples.
Is Full the Same as Double?
Yes, entirely. The terms "full" and "double" refer to the same mattress: 137 cm by 191 cm. The name "double" dates from the era when a twin was considered a single sleeper's bed and the wider version was "double" the width for two sleepers. In practice a double is not twice the width of a twin (99 cm x 2 = 198 cm, not 137 cm), but the naming stuck. Canadian retailers use both terms interchangeably. When you see a bed frame advertised as a "full/double," the dimensions are identical to the measurements in the table above.
Full Size Bed Dimensions in cm for Bed Frames
A mattress measuring 137 cm x 191 cm sits inside a bed frame that is slightly larger on every dimension. Frame interior dimensions typically match the mattress closely, while the exterior footprint depends on the frame style, headboard, footboard, and rail width. When planning your bedroom layout, account for:
- Mattress: 137 cm x 191 cm
- Standard frame exterior (approximate): 142 cm to 145 cm wide, 196 cm to 200 cm long
- Headboard overhang: Adds roughly 10 to 20 cm to the wall-to-frame distance if you want to allow for a headboard without it pressing directly against drywall
Platform frames, which skip the box spring, sit lower to the floor and tend to have a sleeker profile. Traditional frames with a box spring add 30 to 45 cm to the total mattress height, which affects how sheets are tucked and how easy it is to get in and out of bed.
Room Size Requirements for a Full Size Bed
Interior designers commonly recommend at least 61 cm (24 inches) of clearance on each side of the bed and at the foot to allow comfortable movement. Applying that standard to a 137 cm x 191 cm mattress inside a frame that is roughly 142 cm wide by 198 cm long:
| Clearance Position | Recommended Space | Running Total (room width or length needed) |
|---|---|---|
| One side clearance | 61 cm | -- |
| Frame width | 142 cm | -- |
| Other side clearance | 61 cm | 264 cm total width |
| Headboard wall gap | 15 cm | -- |
| Frame length | 198 cm | -- |
| Foot-of-bed clearance | 91 cm (dresser access) | 304 cm total length |
In practical terms, a bedroom of roughly 270 cm by 300 cm (about 9 by 10 feet) can fit a full size bed with workable clearances on all sides, assuming you push the headboard to the wall. A room of 300 cm by 360 cm (10 by 12 feet) gives you the breathing room to add two nightstands and walk freely. Anything smaller than 240 cm in either direction will feel cramped once the frame is installed.
Full Size Bed: Who Is It Best For?
The full size works well in specific situations and falls short in others. Here is an honest breakdown.
Great fit for:
- Single adults under approximately 178 cm (5 feet 10 inches) who want more room than a twin but do not need queen-level width
- Teenagers transitioning out of a twin, especially in rooms where a queen would be tight
- Guest bedrooms that occasionally host one adult or a visiting couple who does not mind cosy quarters
- Studio apartments and small condos where floor space is at a premium
- Children old enough to need more room than a single but too young for a queen
Less ideal for:
- Two adults who share the bed nightly; each person gets only about 68.5 cm of width, narrower than a solo twin
- Adults taller than 178 cm who may find 191 cm of length limiting
- Primary bedrooms where long-term sleep quality for couples is the priority
- Anyone who tosses and turns frequently or sleeps with a pet on the bed
Full Size Mattress Types and What to Consider
The size of your mattress interacts with its construction. A 137 cm x 191 cm memory foam mattress behaves differently from the same dimensions in a hybrid or innerspring. Here is what to think about when choosing materials for a full size bed.
Memory Foam
Memory foam in a full size is a popular choice for solo sleepers who want pressure relief and motion absorption. Because there is only one person on a narrower surface, the foam contours closely and reduces the sensation of rolling toward the middle of the bed. Look for density ratings of at least 4 lb per cubic foot in the comfort layer for durability in a full size, as lighter-density foams tend to develop body impressions faster on a single-sleeper's consistent path.
Hybrid
A hybrid mattress combines a pocketed coil base with foam or latex comfort layers. In a full size, pocketed coils still provide some motion isolation between two people sharing the bed, though the close quarters mean any movement will be noticed more than on a queen or king. Hybrids in a full tend to offer better edge support than all-foam mattresses, which matters when you are rolling out of a narrower sleeping surface.
Innerspring
Traditional innerspring mattresses in a full size offer responsive bounce and strong airflow. They are typically the most affordable option and remain popular for guest rooms and teenagers. The coil gauge and coil count matter for longevity. A higher coil count spread across 2.61 square metres means each coil has less work to do per square centimetre of pressure.
Latex
Natural or synthetic latex in a full size is durable and resistant to body impressions. Latex mattresses in the full dimension tend to be heavier than foam equivalents, which matters during rotation, which should happen every three to six months.
Bedding and Accessories for a 137 cm x 191 cm Mattress
Buying the right sheets, protector, and frame accessories for a full size mattress requires attention to labelling. In Canada, bedding is labelled by mattress size name rather than raw centimetre measurements, but those labels do not always translate cleanly between brands.
| Product | What to Look For | Notes |
|---|---|---|
| Fitted sheet | Labelled "Full" or "Double," pocket depth matching mattress thickness | Most full mattresses are 25 to 35 cm thick; confirm pocket depth before buying |
| Flat sheet | Labelled "Full/Queen" (many brands use one sheet for both) | A queen flat sheet works fine on a full; it simply tucks more generously |
| Duvet / comforter | Labelled "Full/Queen" | Most manufacturers do not make a full-only duvet; the combined size is standard |
| Mattress protector | Labelled "Full" or "Double" | Check pocket depth; encasement-style protectors need to match mattress thickness closely |
| Bed frame | Listed as "Full" or "Full/Double" | Confirm interior frame dimensions if purchasing a slatted platform frame |
One common shopping pitfall is assuming that a "Full/Queen" flat sheet or duvet also means the fitted sheet is the same. It is not. Fitted sheets are cut precisely to the mattress dimensions, so a queen fitted sheet on a full mattress will bunch under the corners and shift during sleep.
Full Size Bed in cm vs. European Standard Sizes
Shoppers who have lived in Europe or purchase imported bed frames sometimes encounter European standard sizes, which differ from North American dimensions. A common point of confusion is the European "double," which is often 140 cm x 200 cm, compared to the North American full at 137 cm x 191 cm. The differences are small but meaningful for fitted sheets and frame compatibility.
| Size | Width (cm) | Length (cm) | Market |
|---|---|---|---|
| Full / Double (North American) | 137 cm | 191 cm | Canada, USA |
| European Double | 140 cm | 200 cm | UK, EU |
| IKEA Full (LURÖY / SULTAN) | 140 cm | 200 cm | Canadian IKEA stores |
If you purchase an IKEA full-size bed frame from a Canadian IKEA location, be aware that it is sized to 140 cm x 200 cm. A standard North American full mattress at 137 cm x 191 cm will fit inside an IKEA full frame with some gap at the sides and foot. Conversely, an IKEA mattress at 140 x 200 cm will not fit properly inside a standard North American full frame. Always check the exact frame interior dimensions before mixing brands.
How Mattress Thickness Affects Full Size Bed Dimensions
The 137 cm x 191 cm measurement refers to the sleeping surface. Mattress thickness varies significantly and affects the total height of your sleeping setup, how easy it is to get in and out of bed, and whether your existing fitted sheets will reach around the mattress properly.
| Mattress Profile | Typical Thickness | Best For |
|---|---|---|
| Low profile | 15 to 20 cm | Bunk beds, trundle frames, children's rooms |
| Standard | 20 to 25 cm | Most adult sleepers, platform frames |
| Mid-profile | 25 to 30 cm | Adults wanting more cushioning, combined with a box spring |
| Pillow-top / Luxury | 30 to 40 cm | Sleepers who prefer a plush, hotel-style feel |
A mattress thicker than 30 cm may require deep-pocket fitted sheets (sometimes labelled "ultra deep pocket") to stay in place overnight. If you are buying a new mattress and replacing old bedding at the same time, note the thickness first and shop for matching pocket-depth sheets.
Full Size Bed and Sleep Quality: The Connection
Mattress size is one of the underappreciated factors in sleep quality. Research in sleep science consistently shows that restricted sleeping space increases nighttime movements, micro-arousals, and perceived sleep dissatisfaction. A full size bed gives a solo sleeper 137 cm of uninterrupted width, which is ample for most sleeping positions including side sleeping, stomach sleeping, and starfish-style back sleeping.
For couples, the math is tighter. Two adults sharing 137 cm have roughly 68 cm each, which is narrower than the 99 cm a solo sleeper gets on a standard twin. Couples who are light sleepers or who have different movement patterns during the night may find that the proximity leads to more sleep disruption. If sleep quality for two is a priority, the upgrade to a queen or king mattress is worth budgeting for, even in a smaller room.
That said, plenty of couples have slept comfortably on a full size bed for years. Sleeping position compatibility matters. Couples who spoon or sleep close together by preference may find the full entirely adequate. Those who each want their own territory will notice the limitations quickly.
Choosing a Mattress Material for a Full Size Bed: Practical Advice
At Mattress Miracle, we help customers navigate the material question daily. A few principles apply specifically to the full size dimensions.
Because a full size mattress is narrower than a queen, the edges see proportionally more use. Strong edge support matters more in a full than it might in a king, where sleepers naturally gravitate toward the middle. Look for reinforced edge foam or a perimeter coil system if you or your partner tends to sleep near the edge.
Motion transfer is another consideration amplified by the smaller surface. In a king, two sleepers are separated by nearly a metre of mattress material. In a full, they are separated by much less. Pocketed coil hybrids and high-density memory foam both reduce motion transfer better than traditional innerspring designs or budget foam.
Finally, consider how you will move and rotate the mattress. A full size mattress at 137 cm x 191 cm is lighter and easier to handle than a queen or king, which matters if your bedroom is at the top of a staircase or down a narrow hallway. Latex and high-density hybrid mattresses in the full size can still weigh 35 to 55 kg, so plan for a second person during delivery and setup.
Full Size Mattress Lifespan and When to Replace
The same lifespan guidelines that apply to any mattress apply to a full size. Most quality mattresses last 7 to 10 years with proper care. Signs that a full size mattress needs replacing include visible sagging or body impressions deeper than 2 to 3 cm, persistent morning stiffness or back pain that improves when you sleep elsewhere, visible spring protrusions, and a musty or persistent odour that does not clear with airing out.
Rotating a full size mattress 180 degrees every three months during the first year of use, and every six months after that, extends the life of the mattress by distributing wear evenly across the 137 cm x 191 cm surface. Most modern mattresses are one-sided (no flipping), but rotating is still recommended.
A quality mattress protector adds years to the life of any mattress by blocking moisture, skin cells, and allergens from penetrating the comfort layers. Given the cost difference between a protector and a new mattress, this is one of the simplest investments in sleep quality available.
Full Size Bed Dimensions in cm: Quick Reference Summary
| Fact | Detail |
|---|---|
| Width | 137 cm (54 inches) |
| Length | 191 cm (75 inches) |
| Also called | Double bed |
| Best for | Single adults, teenagers, guest rooms |
| Minimum room size | 270 cm x 300 cm (approx. 9 x 10 feet) |
| Width per person (two adults) | Approx. 68.5 cm each |
| Fitted sheet pocket depth | Match to mattress thickness; typically 25 to 35 cm for standard mattresses |
Frequently Asked Questions
What are the dimensions of a full size bed in cm?
A full size bed measures 137 cm wide by 191 cm long (54 inches by 75 inches). This is the standard full or double mattress size in Canada and the United States.
Is a full size bed big enough for two adults?
A full size bed can fit two adults, but it is tight. Each person gets roughly 68.5 cm (27 inches) of sleeping width, which is narrower than a twin mattress used solo. Couples who want more space should consider a queen or king.
What is the difference between a full and a double bed in cm?
There is no difference. A full bed and a double bed are the same size: 137 cm wide by 191 cm long. The two names refer to the same mattress dimensions.
What room size do I need for a full size bed?
A minimum bedroom size of about 280 cm by 330 cm (roughly 9 by 11 feet) is recommended for a full size bed, allowing space to walk around and open drawers or a closet comfortably.
Is a full size mattress the same as a queen in Canada?
No. A full size mattress is 137 cm by 191 cm. A Canadian queen mattress is 153 cm by 203 cm, making it 16 cm wider and 12 cm longer than a full.
What is a full size bed set in Canada?
A full size bed set (also called a double bed set) includes bedding for a 137 x 191 cm (54" x 75") mattress. A complete bed set typically contains a fitted sheet, flat sheet, two pillowcases, and sometimes a comforter or duvet cover. When shopping in Canada, look for items labelled "double" or "full" - the two terms describe the same size. Full size comforter sets are available at most bedding retailers, though selection is narrower than queen. For natural fiber options in full size, see our natural bedding collection - call 519-770-0001 to confirm current double-size availability.
What full size bed sheets fit a 137 x 191 cm mattress?
Any sheet set labelled "full" or "double" is designed for a 137 x 191 cm (54" x 75") mattress. Fitted sheets for a full size bed measure 54" x 75" in the sleeping surface area, plus a pocket that wraps the mattress depth. Standard pocket handles up to 12 inches deep; deep pocket covers 13 to 16 inches; extra-deep handles 17 to 22 inches.
Most modern foam and hybrid full size mattresses are 12 to 14 inches thick, so deep pocket fitted sheets are often the better choice. Full size flat sheets measure approximately 81" x 96" (206 x 244 cm), which provides enough tuck-in on the sides and foot.
What size comforter fits a full size bed?
A comforter for a full size bed (137 by 191 cm, 54 by 75 inches) should measure at least 76 by 86 inches to allow adequate drape on the sides and foot of the bed. Most "full/queen" comforters on the Canadian market measure 86 by 86 or 90 by 90 inches, which works on a full bed with extra drape.
If you prefer a fitted, tailored look, look for a full-only comforter at 76-80 by 86-90 inches. Full/queen comforters at 86 by 90 inches will have more overhang, which many people prefer. Full size comforter sets are available but less common than queen; selection narrows at specialty stores and online.
What size comforter set do I need for a full size bed in Canada?
A comforter set for a full size bed in Canada typically includes a comforter measuring 76-86 by 86-90 inches, two standard pillowcases, and sometimes a bed skirt and shams. Many Canadian retailers label these as "full/queen" size because the same comforter fits both - the difference is in how much it hangs over the sides. For a more tailored fit on a full bed, choose comforters labelled specifically "full" rather than "full/queen." Thread count and fill power matter more than the exact labeled dimensions when assessing quality.
What is included in a full size bed sheet set, and what should I look for?
A full size bed sheet set is sized to a 54-by-75-inch mattress (137 by 191 cm) and typically includes a full fitted sheet (54 × 75 with pocket depths from 9 to 22 inches), a full flat sheet (81 × 96 inches - wider than the mattress to allow tucking), and two standard pillowcases (20 × 26 inches). Some sets bundle a bed skirt; quilted sets sometimes include shams.
The four specs that determine whether a full sheet set is actually good: fibre type (long-staple cotton like Pima, Egyptian, or Supima), thread count between 200 and 600 in single-ply (anything advertised above 800 typically uses multi-ply yarn arithmetic), weave (percale crisp/cool, sateen silky/warmer), and pocket depth matched to your mattress thickness.
Research published in Sleep Medicine Reviews (Saunders et al., 2020) on bed surface properties found that fabric thermal conductivity and surface smoothness meaningfully affect sleep quality - and long-staple cotton delivers both.
Talia, on our showroom floor, mentions a recurring full-size sheet oversight: customers buying full sheets for a full XL mattress (54 × 80 inches) - five inches longer than standard full, common in dorm rooms - and the sheets bunch at the foot. Browse our cotton bed sheets collection for sized options. For the broader bedding category framework see our cornerstone bedding and linens hub guide.
What size mattress topper fits a full size bed?
A full size mattress topper measures 54 by 75 inches to match a standard full mattress. Full XL toppers (54 × 80) are sized for the longer dorm-room version of full and aren't interchangeable.
Beyond size, the four specs that determine whether a full topper actually solves your problem: thickness (2 inches for mild softening, 3 inches for meaningful pressure relief, 4 inches for significant change), density (4-5 lb/ft³ for memory foam to balance support and longevity), material (memory foam conforms slowly and traps some heat, latex is responsive and cooler, wool regulates moisture but feels firmer), and certification - look for CertiPUR-US on foam products.
Research in Sleep Health (Radwan et al., 2015) on mattress surface design found pressure distribution and conformity are the surface qualities most strongly tied to reduced reported pain - meaning a 3-inch full topper changes both meaningfully on a too-firm or aging mattress. Browse our topper collection for sizes; for memory foam specifically see our best memory foam toppers in Canada.
For the cornerstone topper buying framework see our best mattress topper in Canada.
What size is a full bed sheet set in Canada?
A full (double) bed sheet set in Canada covers a 54 by 75 inch mattress. A fitted sheet should be sized for those dimensions with a pocket depth of 8 to 14 inches depending on mattress thickness. A flat sheet for a full bed runs approximately 81 by 96 to 90 by 108 inches.
Two standard pillowcases (20 by 26 inches) complete the set. Some retailers sell full sheet sets that include only the fitted sheet and pillowcases without a flat sheet. When buying a full sheet set in Canada, confirm the fitted sheet pocket depth matches your mattress - thicker foam mattresses may need a 12 to 15 inch pocket.
What is a full air bed?
A full air bed (also called a double air mattress) measures approximately 137 x 191 cm (54 x 75 inches) and accommodates two adults comfortably for short-term use. Full air beds are popular for camping and guest sleeping. Look for models with a built-in electric pump and flocked top surface for the most comfortable temporary sleeping experience.
Full size bed dimensions in centimetres are 137 cm wide by 191 cm long (54 by 75 inches), with some manufacturers producing slightly wider versions at 139 cm (54.5 inches) for beds sold with built-in headboards that need the extra clearance. Mattress Miracle at 441½ West Street in Brantford carries full size mattresses in standard dimensions.
Dorothy recommends verifying centimetre measurements when buying European or IKEA bed frames, because the European double is 140 by 200 cm, which is 3 cm wider and 9 cm longer than the North American full, meaning a standard Canadian full mattress will fit loosely in a European frame and leave noticeable gaps at the head and foot. Call (519) 770-0001.
Brad, Owner since 1997: "Every customer's situation is different. We have been helping Brantford families find the right mattress for over 25 years, and we are always happy to answer questions in person at our showroom on West Street."
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