Looking for a double mattress at Costco and wondering if the warehouse price tag is actually a good deal? The double (also called full size) is one of the most popular mattress sizes in Canada for single adults, teenagers, and guest rooms. It's also the size where the gap between what Costco offers and what a proper mattress store carries is most dramatic. Why? Because when you shrink the mattress surface, coil count and construction quality matter even more.
We're Brad, Dorothy, and Talia at Mattress Miracle in Brantford, Ontario. We've been fitting people to double mattresses for 37 years, and we see the same pattern: customers buy a double at Costco because it's the cheapest option on the floor, then come to us two or three years later because it's already sagging. A double mattress doesn't need to be a compromise. It just needs to be built properly.
Brad, Owner, 40+ years of experience: "We have been helping Brantford families sleep better since 1997. Every customer gets personal attention, honest advice, and the kind of follow-up service you just do not get from big box stores."
8 min read
Double Mattress: The Size That Gets Overlooked
A double mattress measures 54 inches wide by 75 inches long. That's 6 inches narrower and 5 inches shorter than a queen. In Canada, "double" and "full" mean exactly the same thing, so don't let the terminology confuse you when shopping.
The double is the right size for:
- Single adults who want more room than a twin but don't need a queen
- Teenagers upgrading from a twin as they grow
- Guest rooms where space is limited but you want to accommodate visitors comfortably
- Smaller bedrooms in older homes, apartments, and condos where a queen won't fit
- First apartments where budget matters but sleep quality still counts
What a double is not ideal for: two adults sleeping together every night. At 54 inches wide, each person gets 27 inches, which is narrower than a standard crib. Occasional use for couples is fine, but if you're sharing nightly, a queen gives each person 30 inches, and the difference in comfort is significant.
Dorothy's Take on Doubles
"Parents come in all the time buying a double for their teenager, and they almost always start by looking at the cheapest option. I get it. It's a kid's bed. But your teenager is growing, sleeping 8 to 10 hours a night, and developing their spine. A bad mattress at 15 can create habits and posture issues that follow them. I always recommend starting with the ComfortCare at $1,360 in a double. It's barely more than what Costco charges for a mattress with 300 fewer coils and no hand-tufting. The difference in how long it lasts is years, not months."
Costco Double vs Restonic Double: The Numbers
Head-to-Head Comparison (Double Size)
| Feature | Typical Costco Double | Restonic ComfortCare Double |
|---|---|---|
| Price | $400 to $900 | $1,360 |
| Coil Count | 600 to 700 | 980 |
| Coil Type | Pocket coils | Marvelous Middle zoned pocket coils |
| Construction | Adhesive bonded | Hand-tufted (ribbons bind all layers) |
| Cooling | Basic foam | TempaGel gel-infused memory foam |
| Edge Support | Standard foam | SuperEdge Plus foam encasement |
| Made In | Various (often overseas) | Canada |
| Expert Fitting | None (warehouse self-serve) | 20-minute fitting with Brad, Dorothy, or Talia |
| Lifespan | 5 to 7 years | 10 to 15 years |
| Cost Per Year | $85 to $150/year | $63 to $95/year |
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The cost-per-year number tells the real story. Even though the Restonic ComfortCare double costs slightly more upfront, you're paying less per year of use because the mattress lasts roughly twice as long. That $1,360 spread over 12 years is $79 per year. A $600 Costco double that lasts 6 years costs $100 per year. The "cheaper" mattress is actually the more expensive one.
Why Coil Density Matters Even More in a Double
A double mattress has 4,050 square inches of surface area (54 x 75). Here's how the coil density compares:
Coil Density Comparison (Double Size)
- Costco double (650 coils): Each coil covers 6.2 square inches. That's one coil per area roughly the size of your fist.
- Restonic ComfortCare double (980 coils): Each coil covers 4.1 square inches. More than 50% more coils per area.
Brad explains why this matters: "In a double, every inch of real estate counts because you have less surface area than a queen. When coils are spaced further apart, you feel the gaps between them as pressure points, especially around your hips and shoulders. With 980 coils on a double, the support is nearly seamless. Each coil responds individually to your body, which means better contouring and less tossing."
The Marvelous Middle zoning in the ComfortCare takes this further. The centre third of the mattress, where your lower back and hips rest, has firmer coils than the head and foot sections. This prevents the hammock effect where your midsection sinks deeper than your shoulders and legs, throwing your spine out of alignment.
Who's Buying a Double? The Right Mattress for Each
Different double mattress buyers need different things. Here's what Talia recommends based on decades of experience:
Recommendations by Buyer
- Teenager (first real mattress): ComfortCare Dalton (firm) or Albany (plush) at $1,360 double. The 980-coil zoned support is excellent for developing bodies, and the 10 to 15 year lifespan means it lasts through high school, university, and into their first apartment.
- Single adult on a budget: ComfortCare at $1,360 double. Best value in the lineup. The TempaGel cooling layer and Marvelous Middle support compete with mattresses costing $1,500 or more at other stores.
- Guest room: ComfortCare at $1,360 double. Comfortable for any guest, durable enough to maintain its quality between uses, and the SuperEdge Plus encasement means guests can sit on the edge without sliding off.
- Back pain sufferer: Revive Tiffany Rose (firm) at $2,295 double. The Talalay Copper Latex provides responsive support that memory foam can't match, and the 3-zone 1,188-coil system targets the lumbar region specifically.
- Hot sleeper: Revive Reflections ET at $2,095 double. Triple cooling system with copper-infused fabric, Joma Wool, and gel memory foam. Also flippable, giving you two firmness options. Includes a 60-day comfort guarantee.
The Teenager Story
Talia shares a common scenario: "A dad came in wanting the cheapest double for his daughter's room. She was 14 and outgrowing her twin. We showed him the ComfortCare at $1,360 and pointed out that if she keeps it through university, that's 8 years of use at $119 per year. The $500 Costco option would probably need replacing in 4 years, so it's actually $125 per year. For the same annual cost, his daughter gets nearly twice the coil count and a mattress that genuinely supports her growing body. He switched on the spot. Called us 6 months later to say she's sleeping better than she ever did on the twin."
Every Restonic in Double Size
Complete Double Size Pricing
| Model | Double Price | Coils | Key Feature |
|---|---|---|---|
| ComfortCare Dalton/Albany | $1,360 | 980 | TempaGel cooling, best value |
| Revive Reflections ET | $2,095 | ~1,000 | Flippable, triple cooling, 60-day guarantee |
| Luxury Silk & Wool | $2,095 | ~740 | Natural materials, flippable, 60-day guarantee |
| Revive Tiffany Rose/Jasmine | $2,295 | ~990 | Talalay Copper Latex, hand-tufted |
| Revive St Charles/Elizabeth | $2,695 | ~990 | 15-inch flagship, maximum comfort |
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Every model is Canadian-made, CertiPUR-US certified, and backed by Restonic's 10-year warranty. Restonic won the American Choice Awards National Best Brand Award, voted #1 by consumers.
Getting Fitted for a Double at Mattress Miracle
A double mattress fitting at Mattress Miracle takes about 20 minutes. Brad, Dorothy, or Talia will ask about your sleep position, any pain you're experiencing, temperature preferences, and who the mattress is for. Then you'll test several models in our showroom.
The fitting matters even more for a double because you have less surface area to work with. Getting the right firmness means the mattress supports your body efficiently across those 54 inches. Too soft and you sink into the narrower surface. Too firm and the pressure points are more concentrated because there's less room to distribute your weight.
This is something Costco simply cannot offer. Their double mattresses sit in plastic on a warehouse floor. Nobody asks what position you sleep in. Nobody checks whether the firmness matches your body weight. Nobody explains why a side sleeper at 130 pounds needs a completely different mattress than a back sleeper at 210 pounds, even in the same size.
White Glove Delivery for Your Double
A double mattress is easier to move than a queen or king, but you still shouldn't have to wrestle one into your car. Mattress Miracle offers white glove delivery: we bring your new double mattress directly to your bedroom, set it up on your frame, remove all packaging, and take away your old mattress.
Delivery costs $99 to $149 depending on distance and is waived on orders over $2,500. Old mattress removal is $49. We deliver to Hamilton, Burlington, Mississauga, Toronto, Kitchener, Waterloo, Guelph, Cambridge, St. Catharines, Niagara Falls, London, Barrie, Oshawa, and everywhere within a 2-hour radius of Brantford.
Frequently Asked Questions
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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 519-770-0001How much is a double mattress at Costco Canada?
Double mattresses at Costco Canada typically range from $400 to $900 depending on brand and model. Common options include Sealy, Serta, and Beautyrest in double/full size. These mattresses typically contain 600 to 700 pocket coils. By comparison, the Restonic ComfortCare double at Mattress Miracle costs $1,360 with 980 pocket coils, hand-tufted construction, and TempaGel cooling.
Is a double mattress the same as a full size?
Yes. In Canada, double and full are the same size: 54 inches wide by 75 inches long. Some manufacturers use "double" while others use "full," but the dimensions are identical. A double is 6 inches narrower and 5 inches shorter than a queen (60 by 80 inches).
Is a double mattress big enough for two people?
A double mattress gives each person 27 inches of width, which is narrower than a standard crib mattress. For couples sleeping together every night, a queen or king is strongly recommended. A double can work for a single adult, a teenager, or occasional couples use in a guest room. If you do share a double, higher coil counts become even more important for motion isolation.
What is the best double mattress in Canada?
The best double mattress depends on your sleep position, body weight, and preferences. At Mattress Miracle, the Restonic ComfortCare Dalton (firm) or Albany (plush) in double offers 980 pocket coils at $1,360, the highest coil count available at this price point. For premium needs, the Restonic Revive Tiffany Rose or Jasmine double is $2,295 with Talalay Copper Latex and true hand-tufted construction. Brad, Dorothy, or Talia can help you decide in a 20-minute fitting.
Why does coil count matter more in a smaller mattress?
A double mattress has 4,050 square inches of surface area compared to 4,800 for a queen. With fewer square inches, each coil covers more area when the coil count is low. The Restonic ComfortCare double at 980 coils gives you 4.1 square inches per coil. A typical Costco double at 650 coils gives you 6.2 square inches per coil. More space per coil means less precise contouring and faster wear on each individual coil.
Does Mattress Miracle deliver double mattresses?
Yes. Mattress Miracle offers white glove delivery for all sizes including double. Our team delivers to your bedroom, sets up the mattress, removes packaging, and takes away your old mattress. Delivery costs $99 to $149 depending on distance and is waived on orders over $2,500. We deliver throughout Southern Ontario including Hamilton, Toronto, Mississauga, Kitchener, and all communities within a 2-hour radius of Brantford.
980 Coils for $950. Come See the Difference.
Mattress Miracle
441 1/2 West Street, Brantford, Ontario N3R 3V9
Phone: (519) 770-0001
Hours: Mon-Wed 10-6, Thu-Fri 10-7, Sat 10-5, Sun 12-4
Before you buy a double mattress at Costco with 650 coils and no fitting, come spend 20 minutes with us. Brad, Dorothy, or Talia will match you to the right Restonic double based on your body, your sleep habits, and your budget. Canadian-made, hand-tufted, starting at $950. White glove delivery to Hamilton, Burlington, Mississauga, Toronto, Kitchener, Waterloo, Guelph, Cambridge, St. Catharines, Niagara Falls, London, Barrie, Oshawa, and everywhere in between.
Visit Our Brantford Showroom
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
Our team has 38 years of experience helping customers find the right sleep solution. Call ahead or walk in any day of the week.
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.