Quick Answer: Single twin beds are the same size: 39 × 75 inches (99 × 191 cm). "Single" and "twin" are two names for the identical mattress. In Canada, "single" is more common in everyday language, while "twin" is the standard industry term used by mattress manufacturers and retailers. There is no size difference between them.
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If you have been searching for single twin beds trying to figure out the difference between them, here is the short version: there is no difference. A single bed and a twin bed are the same mattress, the same frame size, and the same sheets. The two names exist for historical reasons, and depending on where you live in Canada, you might hear one more than the other.
This article clears up the naming confusion and helps you decide whether this size is right for who will be sleeping on it.
Single and Twin: Identical Size, Two Names
A single bed measures 39 inches wide by 75 inches long. A twin bed also measures 39 inches wide by 75 inches long. Same width, same length, same mattress. The sheets are interchangeable. The bed frames are interchangeable. There is nothing to choose between them except which word you prefer.
| Measurement | Single | Twin |
|---|---|---|
| Width | 39 inches (99 cm) | 39 inches (99 cm) |
| Length | 75 inches (191 cm) | 75 inches (191 cm) |
| Surface area | 2,925 sq inches | 2,925 sq inches |
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Why Two Names Exist
The word "single" is the older term. It simply meant a bed for one person, as opposed to a "double" for two. When hotels began putting two of these beds in one room during the mid-20th century, they called the arrangement a "twin room" because it had two matching single beds. The beds themselves became known as "twin" beds, even though each one is technically a single.
Brad, Owner, 40+ years of experience: "I have been selling mattresses since the '80s, and the industry has used 'twin' as the standard label the entire time. Our suppliers label them twin. The tags say twin. But about half our Brantford customers walk in asking for a single. We know what they mean. It is the same bed."
Single/Twin Dimensions: Feet, Inches, and Metric
| Unit | Width | Length |
|---|---|---|
| Inches | 39 | 75 |
| Feet | 3.25 | 6.25 |
| Centimetres | 99 | 191 |
There is also a twin XL (or single XL), which keeps the same 39-inch width but extends the length to 80 inches. This size is common in university dorms and for taller teenagers. For a full comparison, see our twin vs. full mattress guide.
When Each Term Is Used in Canada
Canadian Naming Patterns
- "Single" is more common in everyday Canadian English and in UK-influenced terminology. You will hear it from customers, parents shopping for kids' beds, and in casual conversation.
- "Twin" is the industry standard used by North American mattress manufacturers, retailers, and sheet brands. Product labels, online shopping filters, and mattress specifications almost always use "twin."
- When shopping: Search for "twin" online to get the most results. If you are in a store, either word works. Sales staff know both terms.
- Exception: Some European brands and Australian retailers use "single" exclusively. If you are buying imported bedding, double-check the exact dimensions rather than relying on the name.
Who Fits Comfortably on a Single/Twin Bed
At 39 inches wide, a single/twin bed gives one person about 19.5 inches of space on each side of centre. That is comfortable for children, teenagers, and average-sized adults sleeping alone.
Size and Sleep Quality: Research published in Sleep Health found that sleep surface area affects how restful sleep is, with more space allowing for natural position changes during the night without the sleeper waking (Radwan et al., 2015). For a solo sleeper, a twin provides enough room for typical movement. For someone who sprawls or is over 5'10" tall, a full (54 × 75 inches) or twin XL (39 × 80 inches) may be more comfortable.
| Sleeper | Single/Twin Fit | Better Alternative |
|---|---|---|
| Child (3-12) | Excellent | N/A |
| Teenager (average height) | Good | Twin XL if over 5'10" |
| Adult (solo, under 5'10") | Good | Full for more width |
| Adult (solo, over 5'10") | Tight on length | Twin XL or full |
| Two adults | Not recommended | Full, queen, or king |
Dorothy, Sleep Specialist: "The most common upgrade path I see is a child in a single/twin who outgrows it as a teenager. If the room can handle it, I suggest moving straight to a full rather than a twin XL. You get both the extra width and a more comfortable bed for when they are home from university. Our Restonic ComfortCare twin starts at $675 and the full at $925."
For a complete look at all mattress sizes in Canada, visit our bed size chart and our full size vs. twin comparison.
Single and twin beds are identical in size at 38 by 75 inches in Canada, with "single" being the traditional Canadian and British term and "twin" originating from the American hotel practice of placing two matching beds in one room. Mattress Miracle at 441½ West Street in Brantford carries single/twin mattresses starting at $595 for the Restonic ComfortCare with 690 pocket coils. Dorothy notes that whether you call it a single or twin, the key is matching the mattress to the sleeper, as children and smaller adults do well at 38 inches wide while taller teens should consider the twin XL for the extra 5 inches of length. Call (519) 770-0001.
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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
Is a single bed the same as a twin in Canada?
Yes. Both are 39 × 75 inches. "Single" is more common in everyday Canadian English, while "twin" is the standard industry label used by mattress manufacturers, retailers, and bedding brands. Same bed, same price, same sheets.
Will twin sheets fit a single bed?
Yes. Single and twin beds are the same dimensions, so twin-labelled sheets, mattress protectors, and fitted sheets all fit a single bed perfectly. When shopping online, search for "twin" to find the widest selection.
Why do stores say "twin" instead of "single"?
North American mattress manufacturers standardized on "twin" decades ago. The term appears on industry spec sheets, shipping labels, and retail systems. Some Canadian stores use both terms in their marketing, but the product is identical regardless of the label.
Is a single twin bed big enough for an adult?
For a solo adult of average height and build, a single/twin is adequate. At 39 inches wide, it provides enough space for one person to sleep comfortably. If you are over 5'10", consider a twin XL for the extra 5 inches of length. If you want more width for spreading out, a full (54 inches wide) is the next step up.
Sources
- Radwan, A., Fess, P., James, D., et al. (2015). "Effect of different mattress designs on promoting sleep quality, pain reduction, and spinal alignment." Sleep Health, 1(4), 257-267. PubMed
- Jacobson, B. H., Boolani, A., & Smith, D. B. (2009). "Changes in back pain, sleep quality, and perceived stress after introduction of new bedding systems." Journal of Chiropractic Medicine, 8(1), 1-8. PMC
- Lopez-Torres, M., Porcar, R., Solaz, J., & Romero, T. (2008). "Sleeping mattress determinants and evaluation: a biomechanical review and critique." The Open Biomedical Engineering Journal, 2, 17-25. PMC
- International Sleep Products Association (ISPA). Standard Mattress Size Specifications.
Shop Single/Twin Beds in Brantford
Mattress Miracle
441 1/2 West Street, Brantford
Phone: (519) 770-0001
Hours: Mon-Wed 10-6, Thu-Fri 10-7, Sat 10-5, Sun 12-4
Whether you call it a single or a twin, we have it in stock. Our Restonic ComfortCare twin starts at $675 with 690 pocketed coils, and we carry frames from basic metal platforms to solid Canadian wood. Come try a few and let Talia help you pick the right combination for the room. White glove delivery across Brantford.
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.