Quick Answer: Standard Canadian mattress sizes, Twin: 38"×75" | Double/Full: 54"×75" | Queen: 60"×80" | King: 76"×80" | California King: 72"×84". Queen is the most popular for couples. King offers maximum space. California King is longer but narrower, ideal for tall people.
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Choosing the right mattress size is the first decision, before brand, firmness, or budget. The wrong size creates problems that can't be fixed without replacing the mattress: not enough room for two people, a bed that crowds a small room, or a frame that doesn't fit what you bought. This guide covers every standard Canadian mattress size with dimensions in inches and centimetres, and practical guidance on how to choose.
Complete Mattress Size Chart (Canada)
| Size Name | Inches (W × L) | Centimetres (W × L) | Best For |
|---|---|---|---|
| Twin / Single | 38" × 75" | 97 × 191 cm | Children, single adults, bunk beds, small rooms |
| Twin XL | 38" × 80" | 97 × 203 cm | Taller single sleepers, university dorms |
| Double / Full | 54" × 75" | 137 × 191 cm | Single adults who want more width, smaller guest rooms |
| Queen | 60" × 80" | 152 × 203 cm | Couples, most adults; most popular size in Canada |
| King | 76" × 80" | 193 × 203 cm | Couples who want maximum space; larger bedrooms |
| California King | 72" × 84" | 183 × 213 cm | Taller individuals (6'2"+); narrower than King but longer |
Twin Mattress Dimensions
A twin mattress measures 38 inches wide by 75 inches long (97 × 191 cm). This is the standard single bed size used across North America for children's beds, bunk beds, daybeds, and small single-person spaces.
Key facts about twin mattresses:
- Fits in a 9' × 10' bedroom with walking space on both sides.
- Standard for bunk beds and trundle beds.
- 75" length accommodates adults up to approximately 6'1" (with headroom to spare).
- Most affordable size across all brands and construction types.
- Not recommended for two adult sleepers, too narrow for comfortable shared use.
The Twin XL (38" × 80") adds 5 inches of length. This is the standard size for university dormitory beds in Canada and the US, and is the right choice for adults taller than 6'1" who need a single bed.
Double / Full Mattress Dimensions
A double mattress measures 54 inches wide by 75 inches long (137 × 191 cm). In Canada, "double" and "full" are the same size, the terms are used interchangeably depending on the retailer.
Key facts about double mattresses:
- 16 inches wider than a twin, adds meaningful personal space for a single adult.
- Technically fits two adults, but 54" split between two people gives each only 27" of width, less than a twin mattress alone. Couples are significantly more comfortable on a queen.
- Good size for guest rooms where couples may occasionally stay if a queen won't fit the space.
- Fits in a 10' × 10' bedroom comfortably.
- 75" length is the same as twin, shorter than queen/king (80") and California King (84"). Adults over 6'1" may notice feet near the edge.
Double vs. Queen: Which to Choose?
For a couple, always choose a queen if the room fits it. A double gives each person 27 inches, less space than a single adult in a twin. The step up to queen costs modestly more but makes a significant practical difference in night-to-night comfort. The only reason to choose a double over a queen for a couple is genuine room size constraint, if the room cannot accommodate a queen frame and still allow walking space on both sides, a double is appropriate.
Queen Mattress Dimensions
A queen mattress measures 60 inches wide by 80 inches long (152 × 203 cm). This is the most popular mattress size in Canada, the standard for most couples, and the default size for master bedrooms in Canadian homes built in the last 30 years.
Key facts about queen mattresses:
- 60" width gives each partner approximately 30", similar to a twin mattress per person, but most couples sleep closer than this allows, making it feel roomier in practice.
- 80" length fits adults up to 6'6" (with some footroom).
- Fits comfortably in a 10' × 12' bedroom with walking space on both sides.
- The most widely stocked size, the broadest selection across all brands, construction types, and price points.
- Queen bed frames and sheets are universally available.
King Mattress Dimensions
A king mattress measures 76 inches wide by 80 inches long (193 × 203 cm). It is the widest standard mattress size, providing maximum sleeping surface for couples or people who move extensively during sleep.
Key facts about king mattresses:
- 76" width gives each partner approximately 38", equivalent to a full twin mattress each.
- Same 80" length as queen, not longer, just significantly wider.
- Requires a larger bedroom: recommended minimum room size is 12' × 12', ideally 12' × 14' or larger.
- A king is actually two twin XL mattresses placed side by side, this is the basis for split king setups with separate adjustable bases.
- King sheets, duvets, and frames are widely available but slightly more expensive than queen equivalents.
- Moving a king mattress up stairs or through narrow hallways requires careful measurement, king mattresses are heavy and unwieldy.
Split King Adjustable Bases
A split king consists of two twin XL mattresses on separate adjustable bases, combined in a king-size bed frame. This allows each partner to independently adjust their head and foot elevation, useful when one partner has back pain or acid reflux and the other does not. It requires two separate twin XL mattresses and two compatible adjustable bases. At Mattress Miracle, we carry adjustable bases and can configure split king setups, call us at (519) 770-0001 to discuss options.
California King Mattress Dimensions
A California king mattress measures 72 inches wide by 84 inches long (183 × 213 cm). It is narrower than a standard king (4 fewer inches of width) but longer (4 extra inches of length).
Key facts about California king mattresses:
- The right choice for tall adults (6'2"+) who want a king-size bed but need the extra length.
- Narrower than a standard king, couples who need width should choose a standard king.
- California king sheets and frames are less universally available than standard king, verify availability before purchasing.
- Common in American markets; available in Canada but less common than in California and the US Southwest.
- Same room size requirements as a standard king (12'×12' minimum).
How to Choose the Right Mattress Size
| Situation | Recommended Size | Why |
|---|---|---|
| Child, single sleeper | Twin | Right scale; most affordable |
| Adult over 6'1", single, dorm | Twin XL | Extra length; matches dorm standards |
| Single adult, guest room | Double or Queen | Double for tight space; queen for comfort |
| Couple, standard bedroom | Queen | Best balance of space and room fit; most popular |
| Couple, large bedroom, move a lot | King | Maximum width; each partner gets twin-equivalent space |
| Tall adult (6'2"+), couple | California King | 4" longer than standard king; narrower |
| Couple with different adjustable base needs | Split King (2× Twin XL) | Independent head/foot adjustment per person |
Minimum Room Size Recommendations
These are minimum recommendations, for a comfortable room with nightstands, a dresser, and walking space on both sides and the foot of the bed:
| Mattress Size | Minimum Room (feet) | Comfortable Room (feet) |
|---|---|---|
| Twin | 8' × 10' | 9' × 11' |
| Double | 9' × 10' | 10' × 12' |
| Queen | 10' × 12' | 11' × 13' |
| King | 12' × 12' | 13' × 15' |
| California King | 12' × 12' | 13' × 15' |
Measure your room before purchasing. A queen in a 10' × 10' room will fit but leave minimal walking space. A king in that room will feel cramped. If your room is under 12' × 12' and you're considering a king, measure carefully, doorways, closets, and furniture all reduce usable floor space.
At Mattress Miracle: Every Size Available
We carry Restonic and Sleep In mattresses in all standard sizes, Twin, Double, Queen, King, and California King. If you're unsure what size is right for your room or your sleep situation, bring us your room dimensions and we'll help you work through the options. We're at 441 1/2 West Street in Brantford, open seven days a week. Call us at (519) 770-0001 or come in, no appointment needed.
Frequently Asked Questions
What is the size of a double bed in Canada?
A double bed (also called a full size bed) in Canada measures 54 inches wide by 75 inches long (137 × 191 cm). This is the standard double/full size used across North America. It's 16 inches wider than a twin and the same length. For couples, it provides only 27 inches per person, significantly less than a queen. Most couples are more comfortable on a queen (60" × 80").
What is the size of a queen mattress in Canada?
A queen mattress in Canada measures 60 inches wide by 80 inches long (152 × 203 cm). This is the most popular mattress size in Canada and the standard for most couple's bedrooms. It fits comfortably in a 10' × 12' room or larger. Queen sheets, frames, and duvet covers are the most widely available of all mattress sizes.
What is the size of a king mattress in Canada?
A king mattress in Canada measures 76 inches wide by 80 inches long (193 × 203 cm). It is the widest standard mattress, providing each partner in a couple approximately 38 inches of space, equivalent to a twin mattress each. It requires a minimum bedroom of 12' × 12'. A king is 16 inches wider than a queen but the same length.
What is a California King and how is it different from a regular king?
A California King measures 72 inches wide by 84 inches long (183 × 213 cm). It is 4 inches narrower than a standard king (76") but 4 inches longer. The California King is the right choice for tall adults who need the extra length (6'2" and above). For most couples, a standard king provides more useful space (more width). California King sheets and frames are less universally available than standard king, so verify accessory availability before purchasing.
What is the size of a twin mattress in Canada?
A twin (or single) mattress in Canada measures 38 inches wide by 75 inches long (97 × 191 cm). Twin XL, used in most university dorms, adds 5 inches of length: 38" × 80". Twin is the standard for children's beds, bunk beds, and small single-person rooms. It's not adequate for two adults sleeping together.
How do I measure if a mattress size will fit my room?
Measure your room's length and width. Subtract the mattress dimensions and check whether you have at least 24 inches (2 feet) on each open side of the bed and 24–30 inches at the foot. For a queen (60" × 80") in a 12' × 12' (144" × 144") room, you'd have 84" of remaining width and 64" of remaining length, adequate for nightstands and walking space. For a king (76" × 80") in the same room: 68" width remaining, 64" length remaining, comfortable. In a 10' × 10' (120" × 120") room: a queen leaves 60" width and 40" length, workable but snug; a king would leave only 44" width.
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