Quick Answer: There is no difference between a full and a double bed — they are the same size: 54 inches wide by 75 inches long. "Full" is the term used in US retail; "double" is the term common in Canada and Commonwealth countries. Both names refer to identical dimensions, and all bedding labelled full or double will fit either.
In This Guide
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Full and Double: The Same Dimensions
Let's settle this immediately: a full bed and a double bed are the same thing. Same width, same length, same surface area. There is no hidden size difference between them.
| Name | Width | Length | Total Area | Common In |
|---|---|---|---|---|
| Full | 54 inches (137 cm) | 75 inches (191 cm) | 28.1 sq ft | US retail |
| Double | 54 inches (137 cm) | 75 inches (191 cm) | 28.1 sq ft | Canada, UK, Australia |
If you searched for the "difference between full and double bed" and arrived here, you're not alone. This is one of the most common mattress sizing questions, and the confusion is completely understandable: two different names for the same thing exist in wide circulation, and retailers don't always specify which terminology they're using.
The most practical thing to know: if you buy a mattress labelled "full" in a US store (or a US-based online retailer shipping to Canada), it will be exactly the same size as a mattress labelled "double" at a Canadian store. The same applies to bedding, frames, and all accessories. You can use Canadian "double" sheets on an American "full" mattress without any sizing issues.
For Reference: How Full/Double Compares to Other Sizes
| Size | Width | Length | Also Called |
|---|---|---|---|
| Twin | 38 inches | 75 inches | Single |
| Twin XL | 38 inches | 80 inches | Long single |
| Full / Double | 54 inches | 75 inches | Both names, same size |
| Queen | 60 inches | 80 inches | Standard queen |
| King | 76 inches | 80 inches | Eastern king |
8 min read
Why Do Two Names Exist?
The dual naming traces back to the mid-20th century, when North American and Commonwealth retail markets evolved independently and never fully harmonised their terminology.
In Commonwealth countries (Canada, the UK, Australia, New Zealand), the term "double" became standard because the size was understood to be twice the width of a "single" — referring to the then-standard single-person bed width. A single bed was designed for one person; a double was designed for two. The math was simple, even if the "double" width (54 inches) did not literally provide double a single's 38 inches.
In the United States, "full" emerged as the preferred retail term through the mid-1900s, particularly as furniture manufacturers sought to differentiate their terminology from European conventions. "Full size" implied a complete, adult-appropriate bed — distinct from the narrower twin (which was originally designed for hotel use, where rooms needed pairs of beds, hence "twin").
Neither name won global dominance. US retailers say "full." Canadian retailers say "double." And because cross-border online shopping is now common — Canadians regularly buy from Amazon.com, Wayfair.com, and US furniture sites — both terms appear together in everyday Canadian shopping without any clear standard being enforced.
When Naming Conventions Create Real Confusion
The naming inconsistency is not just academic. A Canadian shopper searching "full size sheets Canada" on Google will see results from US retailers, Canadian retailers, and IKEA — and not all of them will clarify that "full" and "double" are interchangeable. IKEA, which operates in both US and Canadian markets, uses "double" in Canadian stores and product labels but "full" in some of its online documentation and item descriptions — further muddying the waters. Research by the Competition Bureau of Canada (2022) has noted that sizing terminology inconsistency in bedding retail is a recurring consumer complaint, particularly for cross-border purchases.
Shopping in Canada: Which Name Will You See?
In Canadian physical retail stores, "double" is the dominant term. IKEA Canada, The Bay, Linen Chest, Simons, and most Canadian mattress stores (including Mattress Miracle in Brantford) use "double." If you're shopping in person at a Canadian store, you'll see "double" on the price tag, the bedding packaging, and the frame label.
When shopping online — particularly on Canadian marketplaces that include US-based sellers — you'll often see "full" used. Amazon.ca, for instance, hosts both US and Canadian sellers, and the product listings frequently say "full size" rather than "double." Both are the same 54×75-inch product.
IKEA's Terminology (Worth Knowing)
IKEA is worth a specific mention because it's a common source of Canadian purchases for both mattresses and bedding. IKEA Canada sells a "MORGEDAL" foam mattress in "double" size. Their bedding is labelled "double." Their HEMNES and BRIMNES bed frames are sized for "double." When shopping IKEA.ca, "double" is the term to use.
However, some IKEA mattress instruction sheets and European product pages use "full" (since IKEA's global documentation is produced primarily for US and European markets). If you encounter "full" on an IKEA product label, it means the same 54×75-inch double size.
What About "Full XL"?
There is a size called "full XL" that is 54 inches wide by 80 inches long — 5 inches longer than a standard full/double. It is uncommon in Canada and most Canadian retailers do not stock it. Full XL is primarily a specialty size used by some US university dormitories and accessible bedroom manufacturers. If you encounter "full XL" listed as a size, it is wider than a twin XL (38"×80") but 5 inches longer than a standard double.
For most Canadian shoppers, full XL is not a relevant consideration. It's mentioned here because it occasionally appears in cross-border online shopping results and can cause confusion when someone compares it to a standard double.
What Mattress Miracle Carries in Brantford
At Mattress Miracle on 441½ West Street in Brantford, we use "double" to describe the 54×75-inch size throughout our showroom. Our Restonic ComfortCare line starts at approximately $780 in double. Our Sleep In flippable mattresses are available in double as well. Call (519) 770-0001 to check current stock before visiting — Brad or Dorothy can confirm what we have in the showroom and which models can be delivered to your area.
Bedding Compatibility: Full Sheets, Double Sheets
This is the most practically important part of the "full vs double" question for most shoppers: can you use full-size sheets on a double mattress, and vice versa?
Yes. Completely interchangeable. A fitted sheet labelled "full" will fit a double mattress. A fitted sheet labelled "double" will fit a full mattress. They're the same 54×75-inch dimensions.
The only potential issue is mattress depth. Sheets are sized for both mattress width/length AND pocket depth (how deep the fitted sheet's pocket goes around the mattress corners). A standard sheet has a pocket depth of 8–12 inches. A "deep pocket" sheet has 14–16 inches. If your double/full mattress is a thick pillow-top or has a topper added, you may need deep-pocket sheets regardless of whether they're labelled "full" or "double."
Bedding Sizing: What "Full" and "Double" Mean for Each Item
- Fitted sheet: 54"×75" mattress + pocket depth (standard or deep). Full = double.
- Flat sheet: Approximately 81"×96" for full/double. Full = double.
- Duvet insert: Typically 80"×86" for full/double — slightly oversized to drape over the sides. Full = double.
- Duvet cover: Approximately 80"×86", matching the insert. Full = double.
- Mattress protector: Sized to the 54"×75" mattress with pocket depth. Full = double.
- Bed skirt/dust ruffle: Sized to the bed frame dimensions, not just the mattress. Confirm frame width before ordering.
When "Full" Bedding from a US Retailer Won't Work on a Canadian Bed
There is one scenario where sizing confusion creates a real problem: UK "double" bedding imported or ordered from UK retailers. In the United Kingdom, a "double" mattress is 54 inches wide but only 75 inches long — the same as a North American double/full. So UK double sheets fit North American full/double mattresses. However, UK "double" duvet inserts are often sized to UK conventions which can vary by retailer. If ordering from a UK source, verify the exact centimetre dimensions rather than trusting the size label.
How to Avoid Bedding Sizing Mistakes
Before ordering bedding online — whether from a US, Canadian, or UK retailer — always look for the actual dimension specifications in centimetres or inches, not just the size label. The listed mattress fit dimensions (e.g., "fits mattresses 54"×75"") are more reliable than size names. For cross-border purchases, also check return shipping costs for oversized bedding items before buying — return shipping on a king duvet from a US retailer to Canada can exceed the cost of the duvet itself.
Full/Double vs Queen: When to Upgrade
Most people who ask about the difference between a full and a double are actually trying to decide whether their current bed is large enough — or whether they should upgrade to a queen. Here's a direct comparison.
| Factor | Full / Double (54"×75") | Queen (60"×80") |
|---|---|---|
| Width per person (solo) | 54 inches — very comfortable | 60 inches — generous |
| Width per person (couple) | 27 inches — tight | 30 inches — comfortable |
| Length for tall sleepers | 75 inches — fine to ~6'1" | 80 inches — fine to ~6'6" |
| Minimum room width (with 24" aisle) | ~9 feet | ~10 feet |
| Price difference (approx.) | Baseline | +$200–$400 more |
For a single adult, a full/double is entirely sufficient in most rooms. The 54-inch width gives one person room to sleep in any position without feeling confined. The 75-inch length works for most adults up to about 6 feet 1 inch.
For couples, the math becomes more challenging. At 27 inches of personal width each, a couple on a full is sleeping in less space than either would have individually on a twin. Research by Troxel et al. (2007) found that partner movement during sleep is a significant source of sleep fragmentation — and a couple on a full bed, where movement in one body is easily transmitted to the other through limited space, experiences more fragmentation than a couple on a queen.
If a couple is using a full/double as their primary bed, the queen upgrade is worth serious consideration. The 6-inch width difference sounds modest, but at the level of personal sleeping width per person (27 inches vs 30 inches), it makes a meaningful difference in how much the other person's movement is felt.
Brad, Owner at Mattress Miracle (since 1987): "When a couple comes in and they're asking about a double, the first thing I ask is how long they've been sleeping on one. If they've been fine for years, they'll probably be fine on a new double too. But if they're coming in because they're not sleeping well and they're both moving a lot — nine times out of ten, the right answer is a queen. The extra six inches sounds like nothing. It doesn't feel like nothing when you've been bumping into each other for five years."
Shop: All Mattresses at Mattress Miracle
Find Your Perfect Mattress at Mattress Miracle
We are a family-owned mattress store in Brantford, helping our community sleep better since 1987. Come try mattresses in person and get honest, no-pressure advice.
441 1/2 West Street, Brantford, Ontario
Call 519-770-0001Frequently Asked Questions
Is there any difference between a full bed and a double bed?
No. Full and double refer to the exact same mattress size: 54 inches wide by 75 inches long. "Full" is the US retail term; "double" is the Canadian and Commonwealth term. All bedding, frames, and accessories labelled full or double are interchangeable.
Can I use full-size sheets on a double mattress?
Yes. Full sheets and double sheets are the same size — they both fit a 54"×75" mattress. The only additional variable is pocket depth for fitted sheets. If your mattress is thicker than 12 inches (including any topper), look for deep-pocket sheets (14–16 inch pocket depth) regardless of whether the label says "full" or "double."
Why does IKEA sometimes say "full" and sometimes say "double"?
IKEA operates in both US and Canadian markets. In Canadian stores, IKEA uses "double." In US stores, IKEA uses "full." Some product instruction sheets and online documentation (which are produced globally) may use either term. The IKEA "double" and "full" are always the same 54"×75" size.
Should I get a full/double or a queen?
For a single adult, a full/double is usually sufficient. For a couple, a queen is a meaningful upgrade — each person gets 30 inches of personal width versus 27 inches on a double, and the queen's 80-inch length also accommodates taller sleepers. If your room is at least 10 feet wide with comfortable clearances, choose a queen over a double for a couple's primary bed.
Does Mattress Miracle in Brantford carry double/full mattresses?
Yes. We carry double (full) mattresses in our Restonic and Sleep In lines at our showroom at 441½ West Street in Brantford. Call (519) 770-0001 to confirm current stock. We don't work on commission, so we'll give you an honest recommendation based on your room size and sleeping needs.
Sources
- Troxel, W.M., Robles, T.F., Hall, M., & Buysse, D.J. (2007). Marital quality and the marital bed: Examining the covariation between relationship quality and sleep. Sleep Medicine Reviews, 11(5), 389–404. doi.org/10.1016/j.smrv.2007.05.002
- Jacobson, B.H., Gemmell, H.A., Hayes, B.M., & Altena, T.S. (2002). Effectiveness of a selected bedding system on quality of sleep, low back pain, shoulder pain, and spine stiffness. Journal of Manipulative and Physiological Therapeutics, 25(2), 88–92. doi.org/10.1067/mmt.2002.121958
- Competition Bureau Canada. (2022). Misleading representations and deceptive marketing practices in consumer goods. Government of Canada. canada.ca
- Statistics Canada. (2021). Census of Population: Dwelling and household characteristics. Catalogue No. 98-316-X2021001. statcan.gc.ca
- Ontario Building Code (O. Reg. 332/12). (2022). Part 9 — Housing and Small Buildings: Bedroom area requirements. Ontario Ministry of Municipal Affairs and Housing. ontario.ca/laws/regulation/120332
- Verhaert, V., Haex, B., De Wilde, T., Berckmans, D., Verbraecken, J., de Valck, E., & Vander Sloten, J. (2012). Unobtrusive assessment of motor patterns during sleep based on mattress indentation measurements. EURASIP Journal on Advances in Signal Processing, 2012(1), 1–13. doi.org/10.1186/1687-6180-2011-106
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.
If you're deciding between a double/full and a queen, we're happy to walk you through the practical difference on our showroom floor. Bring your room dimensions and we'll help you figure out exactly what fits.
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