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Mattress Size Guide: Find the Perfect Fit
View Single/Twin Size in 3D View Twin XL Size in 3D View Double/Full Size in 3D View Queen Size in 3D View King Size in 3D
Choosing the right mattress size is more than a space decision—it affects sleep quality, partner harmony, and how comfortably your bedroom functions. Use this detailed guide from National Mattress, proudly serving communities across Ontario, to zero‑in on the size that fits your body, lifestyle, and room.
Quick‑Reference Mattress Dimensions
| Size | Dimensions (W × L) | Metric (cm) | Typical Sleeper(s) | Minimum Room Size |
|---|---|---|---|---|
| Crib | 28″ × 52″ | 71 × 132 | Infants & toddlers | 6′ × 8′ |
| Twin / Single | 39″ × 75″ | 99 × 191 | Kids, bunk beds, small guest rooms | 7′ × 10′ |
| Twin XL | 39″ × 80″ | 99 × 203 | Teens, college dorms, tall solo adults | 7′ × 10′ |
| Full / Double | 54″ × 75″ | 137 × 191 | Growing kids, single adults who sprawl | 9′ × 10′ |
| Queen | 60″ × 80″ | 152 × 203 | Most couples, guest rooms | 10′ × 10′ |
| King | 76″ × 80″ | 193 × 203 | Couples needing max width, co‑sleeping with kids or pets | 12′ × 12′ |
| Split King | 2 × Twin XL | 2 × 99 × 203 | Adjustable bases; partners with different firmness needs | 12′ × 12′ |
Pro Tip: Measure doorways, hallways and stairwells to be sure the mattress fits into your home—especially for King. Use our 3D models to virtually place different mattress sizes in your room to see if they fit, and how they will look!
How to Choose the Right Size
1. Body Size & Sleeping Position
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The mattress should be at least 4–6″ longer than the tallest sleeper.
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Side sleepers often sprawl; give yourself extra width if you bend knees or curl arms.
2. Partner & Pet Dynamics
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Queen is Canada’s most popular size for two, but light sleepers may feel partner movement.
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King adds 16″ of width—about the space of an extra pillow between you and your partner—cutting down on heat and motion transfer.
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Sharing with kids or pets more than three nights per week? Upgrade to King or Cal King for uninterrupted rest.
3. Life‑Stage Planning
| Life Stage | Recommended Minimum | Why |
|---|---|---|
| Young Child | Twin | Fits bunk beds; easy to make |
| Tween / Teen | Twin XL or Full | Allows for growth spurts and study time in bed |
| Single Adult | Full | Room to sprawl without swallowing floor space |
| Couple | Queen | Balances space and cost for most bedrooms |
| Couple + Kids/Pets | King | Spare width prevents elbows and tails in your ribcage |
4. Room Layout & Furniture Flow
Leave 24–30″ of clearance around each side and the foot of the bed to open drawers, walk freely, and change sheets.
5. Future Flexibility
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Converting a teen’s room to a guest room soon? A Full offers multipurpose comfort.
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Considering an adjustable base down the road? Split King or Twin XL pair makes the change painless.
Why Canadians Choose National Mattress
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Commission‑Free Experts – Genuine advice focused on your comfort, not quotas.
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All the Sizes, All the Feels – Test every dimension and firmness in our province‑wide showrooms—from Ottawa to Windsor.
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Fast, Free Local Delivery – Next‑day delivery on most in‑stock sizes.
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100‑Night Comfort Exchange – Swap size or firmness if it’s not perfect.
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Giving Back – Each purchase helps provide bed kits to children in need through Sleeping Children Around the World.
Ready to Stretch Out?
Order online or visit any National Mattress showroom across Ontario to lie down on every size before you decide. Upgrade Your Sleep® with National Mattress and sleep comfortably and affordably—today, tomorrow, and for years to come.
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