Quick Answer: A full size bed measures 137 cm wide by 191 cm long, converted from 54 by 75 inches. The exact figures are 137.16 by 190.5 cm, because Canada's Weights and Measures Act fixes the inch at 2.54 cm. Canadian stores sell this mattress as a double, and it covers 2.61 square metres.
9 min read | Updated October 9, 2026
A full size bed is a mattress 54 inches wide and 75 inches long, sold in Canada as a double. In metric that is 137.16 by 190.5 cm, or 1,372 by 1,905 millimetres. The Mattress Miracle size chart prints it as 137 x 191 cm. All 41 mattresses in our double mattress collection come in that size, priced from $151 (a sale on the 5-inch foam, regularly $153) to $3,224.
The inch is a legal unit here. Schedule II of Canada's Weights and Measures Act defines the yard as 0.9144 metre and the inch as 1/36 of a yard. One inch is therefore exactly 2.54 cm, and every centimetre figure on this page is arithmetic.
Dorothy Balicki, Mattress Miracle, 40+ years in mattress retail: "Most bedroom size mistakes happen because people guess instead of measure. Bring your tape measure, your bedroom dimensions, and an open mind to our showroom."
Some charts give a full's length as 190 cm and others as 191 cm. Both are rounding 190.5 cm, which sits exactly halfway between two whole centimetres. The width, 137.16 cm, becomes 137 cm either way.
Full Size Bed Dimensions in cm, mm, Inches and Feet
Full size bed dimensions are 54 by 75 inches, which is 137.16 by 190.5 cm, or 4 feet 6 inches by 6 feet 3 inches. The sleeping surface covers 2.61 square metres. For every standard size on one page, see our Canadian mattress size conversion chart.
| Measurement | Inches | Centimetres (exact) | Centimetres (rounded) | Millimetres | Feet |
|---|---|---|---|---|---|
| Width | 54 in | 137.16 cm | 137 cm | 1,372 mm | 4 ft 6 in |
| Length | 75 in | 190.5 cm | 191 cm (or 190) | 1,905 mm | 6 ft 3 in |
| Surface area | 4,050 sq in | 26,129 sq cm | 2.61 sq m | n/a | 28.1 sq ft |
Use the exact figures when a fit is tight, such as an alcove, a captain's bed or a frame listed in millimetres. For sheets and an ordinary frame, 137 x 191 cm is close enough. Our guide to full size bed dimensions in feet works through the same bed in feet.
Is a Full Bed 53 or 54 Inches Wide?
A full bed is 54 inches wide by its standard size, though some charts list 53. The Sleep Foundation's full size guide (Lauren Fountain, updated July 16, 2025) gives 54 by 75 inches and notes slight size differences between manufacturers. The Better Sleep Council's size chart prints the full at 53 inches.
That inch is 2.54 cm. Fifty-three inches is 134.62 cm, so a chart built on 53 shows a full about 2.5 cm narrower than one built on 54. The Mattress Miracle size chart uses 54, as do the double listings we checked in our catalogue. Before ordering a tight frame or a built-in, run a tape across the mattress top, edge to edge, and write the number down in centimetres.
Is Full the Same as Double?
Yes. Full and double are two names for one mattress, 54 by 75 inches (137 x 191 cm). Canadian retailers, Mattress Miracle among them, mostly say double; American brands say full. Bedding or a frame labelled "full/double" is cut to the same size.
The name dates from when most beds were singles or doubles, and the double was the one for two. It was never twice the width: two twins side by side measure 193 cm, against a double's 137 cm. Our guide to the double bed size in Canada covers its other Canadian specs.
Full Size vs All Standard Canadian Mattress Sizes in cm
The full size sits between the twin and the queen. It shares the twin's 190.5 cm length and is 40.64 cm (16 inches) wider than a standard 38-inch twin. Many Canadian spec sheets, our own size chart included, print the twin at 39 inches (99 cm). Our twin mattress size guide for Canada explains why both numbers describe the same bed. Each size is defined in inches; the centimetres are conversions.
| Size name | Inches | Centimetres (exact) | Rounded cm | Compared with a full |
|---|---|---|---|---|
| Twin (single) | 38 x 75 (often listed 39 x 75) | 96.52 x 190.5 | 96.5 x 191 (99 x 191 at 39 in) | 40.64 cm narrower |
| Twin XL | 38 x 80 | 96.52 x 203.2 | 96.5 x 203 | 40.64 cm narrower, 12.7 cm longer |
| Full / Double | 54 x 75 | 137.16 x 190.5 | 137 x 191 | Reference size |
| Full XL / Double XL | 54 x 80 | 137.16 x 203.2 | 137 x 203 | Same width, 12.7 cm longer |
| Queen | 60 x 80 | 152.4 x 203.2 | 152 x 203 | 15.24 cm wider, 12.7 cm longer |
| King | 76 x 80 | 193.04 x 203.2 | 193 x 203 | 55.88 cm wider, 12.7 cm longer |
| California King | 72 x 84 | 182.88 x 213.36 | 183 x 213 | 45.72 cm wider, 22.86 cm longer |
The full XL is mostly a dorm size, and its sheets are 12.7 cm longer than a full's. When a partner is about to share the bed, the next question is full or queen. Our full vs queen bed dimensions comparison answers it with prices from our floor.
Full Size Bed Frame Dimensions in cm and Feet
A full size bed frame needs an inside of at least 137.2 by 190.5 cm (4 feet 6 inches by 6 feet 3 inches). The outside is larger by the rails, headboard and footboard, which vary by style, so there is no standard exterior size. Take the overall width and length from the frame's listing before you plan the room.
| What to measure | Full size figure | Why it matters |
|---|---|---|
| Frame interior | At least 137.2 x 190.5 cm | Smaller and the mattress bows; much larger and it slides |
| Frame exterior | Interior plus rails, headboard and footboard | The number your room plan needs |
| Foundation height | Our standard double box spring: 5.1, 12.7 or 19.1 cm (2, 5 or 7.5 in) | Sets how high you sit on the edge |
Mattress Miracle sells 52 frames in double, out of 55 in our double bed frame collection, from $190 for a foldable metal frame. Traditional frames take a foundation, and our standard box spring is $139.99 in double at all three heights. Platform, storage, wood and metal styles in every size are in all of our bed frames.
Older and antique double frames can measure under 137 x 191 cm. For those, our custom size mattress service cuts a mattress to the frame: 2 to 3 weeks, quoted individually, every measurement confirmed by phone. Custom cuts are not covered by the 60-Night Comfort Guarantee.
Room Size Requirements for a Full Size Bed
A full size bed needs a room of about 274 x 305 cm, the 9 by 10 foot minimum on our size chart. The chart also asks for 61 cm (2 feet) of walking space on each side and at the foot. Worked through in centimetres for the mattress alone, before the frame:
| Floor space | Across the room | Along the bed |
|---|---|---|
| Mattress | 137.2 cm | 190.5 cm |
| Walking space, 61 cm per open side | + 121.9 cm | + 61 cm |
| Total footprint | 259.1 cm (8 ft 6 in) | 251.5 cm (8 ft 3 in) |
| With 91 cm at the foot for dresser drawers | 259.1 cm | 281.9 cm (9 ft 3 in) |
In a room narrower than 259 cm, one side loses its walkway and the bed goes against a wall. A room of about 305 x 366 cm (10 by 12 feet) usually takes two nightstands and a dresser too. For a spare room that doubles as an office, our Murphy bed guide covers beds that fold into the wall.
Measuring for a Double Before You Visit West Street
Bring three numbers to Mattress Miracle at 441 1/2 West Street in Brantford: the room's width, its length and the narrowest doorway on the way in. Then lie on a double and see how 137 cm feels with your pillow. If you cannot get here, call 519-770-0001 during store hours and an advisor will walk the floor with you by phone.
Who Fits on a Full Size Bed: Height, Teens and Couples
A full size bed fits one adult well, a teen up to about 175 to 180 cm, and two adults tightly. Length sets the height limit. The National Bed Federation is the UK trade body for bed makers. Its bed buyers' guide says a bed should be 10 to 15 cm longer than the tallest sleeper. On a full's 190.5 cm, that means sleepers up to 175.5 to 180.5 cm, about 5 feet 9 inches to 5 feet 11 inches.
Width limits couples. Split two ways, a full gives each person 68.6 cm (27 inches). A 1980 Human Factors study measured 239 truck and bus drivers in three sleep postures (Sanders, 1980). It recommended at least 84 cm of sleeper-berth width to fit 90% of them. Half a full falls 15.4 cm short of that; a twin's 96.5 cm clears it for one person.
- Good fit: one adult who wants more than a twin's 96.5 cm, a guest room, or a teen under about 178 cm (5 ft 10 in).
- Tight fit: two adults sharing nightly. A queen size mattress gives each of them 76.2 cm.
- Too short: anyone over about 180 cm, who needs a 203.2 cm bed.
Full Size Bed in cm vs UK and European Double Sizes
A British double has the same imperial size as a North American full, 4 feet 6 inches by 6 feet 3 inches. The National Bed Federation lists it that way, with a metric size of 135 x 190 cm: 2.16 cm narrower and 0.5 cm shorter than a Canadian double. The federation also warns that bed sizes are not standardised, so measure the inside of a UK frame before buying a mattress for it.
Mainland European beds are sized in whole centimetres. The Wikipedia bed size reference gives 200 cm as the usual European length. It lists 140 x 190 cm first among the most common double sizes in France. A 140 x 200 cm frame is 2.84 cm wider and 9.5 cm longer than a Canadian full, so a full mattress sits loose in it.
| Bed | Defined as | Exact cm | Against a Canadian full |
|---|---|---|---|
| Canadian double / US full | 54 x 75 in | 137.16 x 190.5 | Reference size |
| UK double | 4 ft 6 in x 6 ft 3 in, or 135 x 190 cm | 137.16 x 190.5 (imperial) or 135 x 190 (metric) | Same in imperial; 2.16 cm narrower and 0.5 cm shorter in metric |
| French double | 140 x 190 cm | 140 x 190 | 2.84 cm wider, 0.5 cm shorter |
| European double, 200 cm length | 140 x 200 cm | 140 x 200 | 2.84 cm wider, 9.5 cm longer |
| UK king | 5 ft x 6 ft 6 in, or 150 x 200 cm | 152.4 x 198.12 (imperial) or 150 x 200 (metric) | 12.84 to 15.24 cm wider, 7.62 to 9.5 cm longer |
The size names do not travel well. A UK king is about the width of a Canadian queen, 150 to 152.4 cm, while a Canadian king is 193 cm. If you bring a frame from Europe, measure its inside before buying a mattress. When no standard size fits, we can cut a mattress to fit the frame.
Bedding and Accessories for a 137 cm x 191 cm Mattress
Bedding for a 137 x 191 cm mattress is sold as double or full. Two numbers matter more than the label: the size and the pocket depth. The sizes below come from Mattress Miracle's Canadian bedding size chart, converted at 2.54 cm per inch.
| Item | Double size | What to check in cm |
|---|---|---|
| Fitted sheet | 54 x 75 in plus pocket | Pocket deeper than mattress height plus protector |
| Flat sheet | 81 x 96 in (206 x 244 cm) | 34 cm past the mattress top on each side |
| Duvet or comforter | 78 x 86 in (198 x 218 cm) | About 30.5 cm of drape on each side |
| Mattress protector | 54 x 75 in (137 x 191 cm) | Rated depth at least your mattress height |
| Pillowcases | Standard, 20 x 26 in (51 x 66 cm) | Two pillows span 132 cm of the 137 |
Pocket depth is where doubles go wrong. Our Versaille 300TC Egyptian cotton sheet set is $140 in double. Its listing says the 17-inch (43 cm) drop fits mattresses up to about 15 inches (38 cm) with a protector on. The Basic Protection mattress protector, made in Canada, is $38 in double and fits mattresses up to 38 cm deep. Our cotton bed sheets state the mattress depth each pocket fits, so measure your mattress and protector together before you choose.
The other trap is a full XL sheet on a full. It is 12.7 cm longer and bunches at the foot. Compare bed sheets in double and every other size, or check our bed sheet size guide first. Duvets come cut in double too, eight of them in our double duvet collection. Thirteen of the 28 pieces in our natural bedding collection also come in double, so call ahead to confirm the one you want is in stock.
A full topper is cut to the same 54 by 75 inches, and a full XL topper is 12.7 cm too long. All six in our mattress topper collection come in full or double, from $219. Our best mattress topper in Canada guide compares the materials, and our best memory foam toppers in Canada guide narrows the foam choices.
How Mattress Thickness Affects Full Size Bed Dimensions
A full size mattress's 137 x 191 cm describes the top surface only. The Sleep Foundation guide puts most full mattresses at 8 to 14 inches thick, or 20.3 to 35.6 cm. Thickness decides which sheets stay on, how high the edge sits, and whether a bunk keeps safe clearance.
| Mattress profile | Thickness | Typical use |
|---|---|---|
| Low profile | 12.7 to 20 cm (5 to 8 in) | Bunks, trundles, RVs |
| Standard | 20 to 28 cm (8 to 11 in) | Most adults, platform frames |
| Tall | 28 to 36 cm (11 to 14 in) | Hybrids and pillow-tops; deep-pocket sheets |
Our 5-inch foam mattress is 12.7 cm thick, built for bunks and RVs where headroom is tight. For the edge height, add mattress and foundation together. A 30 cm mattress on a 19.1 cm foundation from our box spring collection sits 49.1 cm above the frame slats.
Choosing a Full Size Mattress: Materials, Prices and Lifespan
A full size mattress is narrower than a queen, so its edges get more use and two sleepers lie closer together. Look for a reinforced edge if anyone sleeps near the side. Pocketed coils (springs wrapped one by one in fabric) pass less motion between sleepers than a basic innerspring.
For a guest room or cottage, our advisors reach for the Sleep In Paradise and Cool Breeze, $675 each in double. Both ship rolled by courier to Northern Ontario and Western Canada. For kids and teens, the usual picks are the 6-inch Premium BioFoam ($319) and the 7-inch Luna Premium Foam ($323 on sale, regularly $351). For two people, the Restonic ComfortCare Dalton and Albany is $1,360 in double. It has 980 pocketed coils and a split comfort version, firm on one side and plush on the other.
Compare hybrid mattresses and latex mattresses in the same size, and rotate a full head to foot every few months. All 11 of our mattress protectors come in double, $38 to $194. Every mattress we carry with a 10-year warranty is one we have watched last 10 years. Each eligible mattress also carries our 60-Night Comfort Guarantee: one exchange, no exchange fee.
Brad Grose, founder, Mattress Miracle, family owned in Brantford since 1997, with 40+ years in the mattress industry: "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."
Frequently Asked Questions
What are the dimensions of a full size bed in cm?
A full size bed is 137 cm wide by 191 cm long, from 54 by 75 inches. The exact conversion is 137.16 by 190.5 cm, so some charts print 190 cm. It is the American full, and our Canadian double mattress size guide covers the same bed under its Canadian name.
What is the difference between a full and a double bed in cm?
There is no difference. Both are 137 cm wide by 191 cm long (54 by 75 inches), and bedding labelled either way fits.
What room size do I need for a full size bed?
Plan on at least 274 by 305 cm (9 by 10 feet), the minimum on the Mattress Miracle size chart. That leaves 61 cm of walking space on each side and at the foot.
Is a full size mattress the same as a queen in Canada?
No. A queen is 152 x 203 cm (60 by 80 inches), 15.24 cm wider and 12.7 cm longer than a 137 x 191 cm full. So a 60 by 80 inch bed is a queen. Our queen bed dimensions chart has its metric figures.
Is a 52 by 74 bed a full size?
No. A 52 by 74 inch bed is 132.08 by 187.96 cm, about 5 cm narrower and 2.5 cm shorter than a standard full. A full mattress will not fit it. Mattress Miracle can cut one to those measurements in 2 to 3 weeks, quoted individually.
Is full size the same as king?
No. A king is 193 x 203 cm (76 by 80 inches), 55.88 cm wider and 12.7 cm longer than a full. Our king size mattresses give two adults about 96.5 cm each.
What is the difference between a UK king size bed and a Canadian king size bed?
The National Bed Federation lists a UK king as 5 feet by 6 feet 6 inches (152.4 x 198.12 cm), or 150 x 200 cm in metric. A Canadian king is 193 x 203 cm. The UK king is about 41 to 43 cm narrower, close to the width of a Canadian queen.
Are single beds suitable for adults?
For one adult, usually. A Canadian single is 96.5 x 190.5 cm, wider than the 84 cm a 1980 Human Factors study of 239 drivers recommended. Adults over about 180 cm need the 203 cm length of our twin XL mattresses.
Where can I find full size bed frames with storage drawers?
Our storage bed frame collection has 14 storage beds, and 13 come in double, from $295 to $1,900 in that size. Leave the drawer side its 61 cm walkway so the drawers open.
Shop Double Mattresses in Brantford
Shop: Browse The Mattress Collection
Shop double mattresses at Mattress Miracle
Double (full) is the in-between size that suits a teen, a small guest room or a solo sleeper who likes room.
- see our double mattresses, 41 models from $151 (sale price, regularly $153)
- protectors in every size
- browse double duvets
- double bed frames, from $190
Not near Brantford? See how shopping from anywhere works. An advisor can walk the floor with you by phone, and white glove delivery reaches up to 200 km from the store.
Sources
- Government of Canada. Weights and Measures Act, R.S.C. 1985, c. W-6, Schedule II, Canadian Units of Measurement. laws-lois.justice.gc.ca
- Fountain, L. Sleep Foundation. Full Size Bed Dimensions. Updated July 16, 2025. sleepfoundation.org
- Better Sleep Council. Mattress Sizes. bettersleep.org
- National Bed Federation. Bed Buyers' Guide: Shopping for a New Bed (Typical UK Bed Sizes). bedadvice.co.uk
- Sanders, M. S. (1980). Sleep envelopes and sleeper berth requirements. Human Factors, 22(3), 313-317. doi.org/10.1177/001872088002200305
- Wikipedia. Bed size (European and UK sizes). en.wikipedia.org
- Mattress Miracle. Mattress Sizes Canada and Standard Bedding Dimensions, updated September 14, 2026; live catalogue prices for the double mattress, double bed frame, storage bed, protector, topper, sheet and box spring collections, read October 9, 2026.
Visit Our Brantford Showroom
We are located at 441 1/2 West Street in Brantford, in the city since 1997 and on West Street since 2010. Parking is free, right at the store. Our team does not work on commission, so the advice follows your room and your sleep.
Mattress Miracle, 441 1/2 West Street, Brantford, ON, (519) 770-0001
Hours: Monday to Wednesday 10am to 6pm, Thursday and Friday 10am to 7pm, Saturday 10am to 5pm, Sunday 12pm to 4pm.
If you are deciding whether a full size bed suits your room, bring the measurements and lie on a double first. We will help you check the fit in centimetres or inches.
Find Your Perfect Mattress at Mattress Miracle
We are a family-owned mattress store in Brantford, grateful to help our community sleep better since 1997. Come try a double in person and get honest, no-pressure advice.
441 1/2 West Street, Brantford, Ontario
Call 519-770-0001