Quick Answer: A double bed (54" x 75") is 16 inches wider than a single/twin (38" x 75"). Choose a single for children's rooms, small spaces under 9 x 10 feet, or budgets under $500. Choose a double for solo adults, guest rooms, or teens who need more sleeping space. Both are the same length. Prices differ by $100-$300 on average.
In This Guide
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Side-by-Side Dimensions
The double bed vs single bed comparison starts with measurements, because everything else flows from the physical difference in size. Here's the exact breakdown.
| Measurement | Single / Twin | Double / Full | Difference |
|---|---|---|---|
| Width (inches) | 38" | 54" | +16 inches |
| Length (inches) | 75" | 75" | Same |
| Width (cm) | 97 cm | 137 cm | +40 cm |
| Surface area | 19.8 sq ft | 28.1 sq ft | +8.3 sq ft (42% more) |
| Space per person (solo) | 38" wide | 54" wide | 16 more inches |
| Space per person (2 people) | 19" each (tight) | 27" each (tight) | 8 more inches each |
The 16-inch width difference is the single most important number in this comparison. For a solo adult, 16 extra inches means room to sleep on your side, shift position, and stretch your arms without hanging off the edge. For two people, 27 inches each is still quite narrow. Both sizes are identical in length at 75 inches (6.25 feet), which is worth remembering when height is a factor.
Sleep Surface Width and Movement During Sleep
Research from the Sleep Research Society suggests that adults change sleep position an average of 10-12 times per night. For side sleepers particularly, adequate width matters because shoulder width and hip clearance affect whether the sleeper can maintain neutral spinal alignment without rolling toward the mattress edge. A 38-inch single offers significantly less room for positional adjustment than a 54-inch double, which can affect sleep continuity for active sleepers.
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Who Needs Which: Making the Right Choice
The right size depends on who's sleeping in the bed, what room it's going into, and what you want to spend. Here's a plain guide to who each size actually suits.
Choose a Single / Twin If:
- It's for a child or young teenager: Children don't need adult sleeping width, and a single leaves more room in smaller bedrooms for desks, toys, or a second bed.
- The room is under 9 x 10 feet: A single allows adequate clearance in tight rooms. A double in a very small room feels cramped and leaves minimal walkway.
- You're furnishing a bunk bed: Bunk beds are nearly universally built for single/twin mattresses. Doubles are too wide for most standard bunk frames.
- Budget is the primary factor: Single mattresses and frames typically cost $100-$300 less than the equivalent double.
- You need two beds in one room: Two singles in a shared kids' room allows individual space for each child. Two doubles in the same space would likely be impossible.
- It's a short-term or transitional setup: For college dorms, short-term rentals, or first apartments, a single is portable, affordable, and practical.
Choose a Double / Full If:
- It's for a solo adult: The extra 16 inches makes a meaningful difference for an adult sleeper. A double gives you room to move without the cost of a queen.
- It's a guest room: A double accommodates single adult guests comfortably, and can fit a couple in a pinch. A single sends a message that guests are tolerated, not welcomed.
- A teenager is transitioning to a bigger bed: A double is a meaningful upgrade without the full cost and footprint of a queen, which can feel oversized in a teenager's room.
- The room is 10 x 10 feet or larger: A double fits well with clearance in a standard 10 x 10 secondary bedroom.
- You want room to have a pet sleep at the foot: That extra 16 inches makes a noticeable difference when a dog or cat takes up real estate at the end of the bed.
- Price matters but you want adult comfort: A double is meaningfully cheaper than a queen while offering far more than a single.
Dorothy, Sleep Specialist: "Parents often ask whether to put their 12-year-old in a double or keep the single longer. My honest answer: if the room can take it, the double. Teens sleep a lot and move a lot. A bit more space usually means better sleep."
Room Size Requirements for Each
Knowing the mattress dimensions is only half the equation. You need to know whether the room can actually accommodate the bed with enough walking clearance to feel liveable.
Interior design guidelines typically call for at least 24 inches of walkway on each open side of a bed, and 18 inches at the foot. Here's how each size fits into common room configurations.
| Room Size | Single Fits? | Double Fits? | Notes |
|---|---|---|---|
| 8 x 8 feet | Yes, tight | Challenging | Single only with bed against one wall |
| 9 x 10 feet | Yes, comfortable | Possible, tight | Double with bed against wall works |
| 10 x 10 feet | Yes, roomy | Yes, comfortable | Both work well; double leaves room for dresser |
| 10 x 12 feet | Plenty of room | Very comfortable | Double with walkway on both sides |
| 12 x 12 feet | Excess space | Comfortable | Consider queen at this size |
Room Sizes in Brantford Homes
Brantford has a wide mix of housing stock. Older homes in the Dufferin Avenue area and central Brantford often have secondary bedrooms measuring 9 x 10 to 10 x 11 feet. Many post-war bungalows in the Eagle Place and Terrace Hill areas were built with bedrooms in the 10 x 10 range. Newer homes in Brantford's north end and along Wayne Gretzky Parkway tend to have larger rooms. If you're not sure which size makes sense for your room, measure the floor space first. Bring those measurements to our showroom at 441 1/2 West Street and we can walk you through it.
Price Range Comparison
Price is one of the most practical considerations in this comparison. Here's a realistic range for Canadian shoppers in 2026, covering both mattress and frame separately.
| Category | Single / Twin Price Range | Double / Full Price Range | Typical Difference |
|---|---|---|---|
| Entry-level mattress | $250-$500 | $350-$650 | $100-$150 more |
| Mid-range mattress | $500-$900 | $650-$1,100 | $150-$250 more |
| Premium mattress | $900-$1,500 | $1,100-$1,800 | $200-$300 more |
| Basic bed frame | $80-$200 | $100-$250 | $30-$80 more |
| Platform or storage frame | $250-$600 | $300-$750 | $50-$150 more |
| Restonic ComfortCare (in-store) | Varies | Varies | Call (519) 770-0001 |
The price gap between single and double is generally modest, $100-$300 across most categories. If comfort is the priority, that's rarely a dealbreaker. The bigger cost consideration is usually frame size, since a larger frame also means larger bedding, and sheet sets, duvets, and mattress protectors add up.
Don't Forget the Bedding Budget
Mattress protectors, fitted sheets, and duvets for a double cost about $30-$60 more than for a single when buying new. Over time, that's a small difference. But if you already own a full set of single bedding and you're upgrading to a double, budget for a full bedding replacement. Trying to fit single sheets on a double bed doesn't work and isn't worth the frustration.
Bedding and Accessories: What Changes
Switching from a single to a double means every piece of bedding changes. Here's what you need to replace or purchase new.
| Item | Single Size | Double Size | Can You Use Single Bedding on a Double? |
|---|---|---|---|
| Fitted sheet | Twin / Single | Double / Full | No. Too narrow, won't stay on. |
| Flat sheet | Twin / Single | Double / Full | No. Won't tuck adequately. |
| Duvet / comforter | Single/Twin size | Double/Full or Queen | Marginal. Will barely cover the sides. |
| Mattress protector | Twin / Single | Double / Full | No. Won't fit the corners. |
| Pillowcases | Standard | Standard | Yes. Pillowcases are size-independent. |
We stock a range of mattress protectors in both single and double sizes. A waterproof protector is one of the most practical things you can add to any new mattress. It costs very little compared to the mattress itself and protects the warranty.
Can Two People Sleep in a Double?
Technically, yes. Practically, it depends on the people.
At 54 inches wide, a double gives two adults 27 inches of personal space each. That's the width of a single/twin, which most adults would consider tight even sleeping alone. Couples who move around during sleep, sleep hot, or have significant size differences will likely find a double uncomfortable for long-term use together.
That said, some couples sleep close together and find a double perfectly workable, particularly when the alternative is a larger bed that won't fit the room. For couples sharing a bed long-term, a queen (60 x 80 inches) provides a noticeably better experience if the room and budget allow it.
Brad, Owner, 40+ years of experience: "We've sold doubles to couples for years. Some love them. Most tell us a few months later they wished they'd gone to a queen. If you're buying for two people and the room can take a queen, the extra $150-$200 is usually worth it."
Options at Mattress Miracle
At our Brantford showroom, we carry both single and double mattresses in several models. Here's what's available in each size.
| Model | Single Available | Double Available | Highlights |
|---|---|---|---|
| Restonic ComfortCare | Yes (690 coils) | Yes (980 coils) | Individually wrapped coils, best value for support |
| Sleep In (flippable) | Yes | Yes | Canadian-made, flippable for extended life |
The Restonic ComfortCare in a double uses 980 individually wrapped coils versus 690 in the single size. That's a meaningful difference in how finely the support contours to your body. Each coil responds independently, so pressure points don't transfer across the mattress.
For anyone deciding between a double and a single for a teen or guest room, our team can walk you through both options side by side on the showroom floor. You can see our full mattress collection online, or call Brad at (519) 770-0001 to discuss stock before visiting.
If you're also weighing a double against a queen, see our double bed dimensions guide for a complete size chart with all standard mattress measurements. For understanding what a double needs underneath it, see our double bed slats guide.
Find Your Perfect Mattress at Mattress Miracle
We are a family-owned mattress store in Brantford, helping our community sleep better since 1997. Come try mattresses in person and get honest, no-pressure advice.
441 1/2 West Street, Brantford, Ontario
Call 519-770-0001Frequently Asked Questions
What is the main difference between a double bed and a single bed?
The main difference is width. A single measures 38 inches wide by 75 inches long. A double measures 54 inches wide by 75 inches long. They are the same length. The double is 16 inches wider, giving a solo adult significantly more sleeping room.
Is a double bed big enough for two adults?
A double can accommodate two adults, but it gives each person only 27 inches of width. That's workable for couples who sleep close together, but most sleep specialists suggest a queen (60") or larger for two adults who want comfortable independent movement through the night.
How much more expensive is a double bed compared to a single?
A double mattress typically costs $100-$300 more than an equivalent single in Canada. Bed frames add another $30-$150 to the difference. Bedding sets will also need to be purchased in a new size, typically adding $50-$100 more.
What room size do I need for a double bed vs a single?
A single fits comfortably in a 9 x 10 foot room. A double needs at least 10 x 10 feet for comfortable clearance, or 9 x 10 with the bed placed against one wall. Both measurements include walking clearance on the open sides and at the foot of the bed.
Can I see both single and double beds at Mattress Miracle in Brantford?
Yes. We have both single and double size mattresses on display at our showroom at 441 1/2 West Street, Brantford. Our team can walk you through both options in person. Call (519) 770-0001 to check on current stock before visiting.
What size bed sheets do I need for a single bed in Canada?
A single bed (also called a twin in Canada) uses a 38 by 75 inch mattress. Single bed sheets require a fitted sheet with dimensions approximately 38 by 75 inches and a pocket depth of 8 to 12 inches depending on mattress thickness. A flat sheet for a single bed runs approximately 66 by 96 to 70 by 100 inches. Pillowcases for a single bed use standard (20 by 26 inch) pillows. Single (twin) bed sheets are widely available in Canada at all major retailers and are the same as what Canadians commonly call twin sheets. IKEA sells twin/single bed sheets separately as fitted sheet and pillowcase sets without a flat sheet included.
What size comforter do I need for a single bed in Canada?
A single bed (twin) in Canada uses a 38 by 75 inch mattress. A comforter for a single bed should measure at least 60 by 80 to 68 by 86 inches to provide adequate coverage on the sides. Most twin or single comforters sold in Canada fall in this range. Check dimensions before purchasing since some comforters labelled 'twin' on imported products may be sized slightly smaller than what is standard in Canada. For a child's single bed, a comforter in the 60 by 80 inch range with polyester or down-alternative fill is the most practical choice for machine washing.
What is a single air bed and when should you use one?
A single air bed (also called a twin air mattress) is an inflatable mattress in twin dimensions (38 x 75 inches) used primarily for temporary sleeping - guests, camping, or emergency use. They inflate in two to five minutes with an electric pump. For occasional use, an air bed with a built-in pump and flocked top surface provides the most comfort without the cost of a permanent mattress.
What size is a single bed sheet set?
A single bed sheet set in Canada includes a fitted sheet (38 x 75 inches), a flat sheet (66 x 96 inches), and one standard pillowcase. Some sets include two pillowcases. Look for at least 8-inch deep pockets on the fitted sheet to accommodate single mattresses with toppers. 200-thread-count cotton is the minimum for durability.
Sources
- Jacobson, B.H., et al. (2008). Grouped comparisons of sleep quality for new and personal bedding systems. Journal of Chiropractic Medicine, 7(4), 132-139. doi.org/10.1016/j.jcme.2008.09.003
- Okamoto-Mizuno, K., & Mizuno, K. (2012). Effects of thermal environment on sleep and circadian rhythm. Journal of Physiological Anthropology, 31(1), 14. doi.org/10.1186/1880-6805-31-14
- Bader, G.G., & Engdal, S. (2000). The influence of bed firmness on sleep quality. Applied Ergonomics, 31(5), 487-497. doi.org/10.1016/S0003-6870(00)00013-2
- Sleep Foundation. (2023). Mattress Sizes and Dimensions Guide. Sleep Foundation. sleepfoundation.org/mattress-sizes
- National Sleep Foundation. (2015). 2015 Sleep in America Poll: Sleep and Pain. thensf.org
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 trying to decide between a double and single bed and want to lie on both before committing, we have floor models in both sizes. Bring your room dimensions and we'll help you figure out what actually fits.
Shop This Topic at Mattress Miracle
Popular picks at Mattress Miracle:
- Restonic ComfortCare Dalton & Albany
- Whitney double-sided bamboo mattress
- Somnia 3.0 neck support pillow
Or explore the full mattress range in our Brantford showroom.