Quick Answer
Costco carries Sealy Posturepedic double mattresses ranging from $450 to $800. These are Costco-exclusive models with approximately 600-800 encased coils and standard-density foam. While the price is competitive, the construction is a step below what Sealy offers at specialty retailers.
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."
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Sealy is one of the most recognized mattress names in Canada, and finding a Sealy at Costco prices feels like getting a premium product at a discount. But here's what most shoppers don't realize: the Sealy models at Costco aren't the same as what you'd find at a mattress retailer. They're exclusive models manufactured specifically for warehouse pricing, and the difference matters more than you'd think.
Costco's Sealy Double Mattress Options
Sealy Posturepedic Double (In-Warehouse)
Price: $450-$600 | Coils: ~600-700 encased | Comfort: Tight top or pillow top
Available seasonally, check your local Costco
Sealy Posturepedic Double (costco.ca)
Price: $550-$800 | Coils: ~700-800 | Comfort: Euro top or pillow top
Ships compressed in a box or via freight delivery
Double (also called full) mattresses at Costco typically have fewer model options than queen. When shopping for a Sealy double specifically, you may find only 1-2 options in-warehouse and 2-4 online at any given time.
The Costco Exclusive Model Problem
Why Costco Sealy Models Are Different
- Unique model names Costco Sealy models have names you won't find anywhere else, making spec comparison impossible
- Lower coil counts Costco's Sealy double typically has 600-800 coils versus 800-1,000 in retail Sealy models
- Standard-density foam Lower foam densities (1.5-1.8 lb/ft³) compared to retail lines (2.0+ lb/ft³)
- Thinner comfort layers Less padding above the coil system
- Same brand trust, different construction The Sealy name is identical; the internal quality is not
Brad, our senior mattress consultant, encounters this confusion constantly: "People tell me they got a 'Sealy' at Costco, assuming it's the same as any other Sealy. But Sealy makes dozens of different quality tiers. The Costco version is engineered to hit a price point, not to match what Sealy offers through specialty retailers."
Sealy Double at Costco: What the Specs Actually Mean
| Specification | Costco Sealy Double | What It Means |
|---|---|---|
| Coil count | 600-800 | Adequate but not dense, more gaps between coils means less targeted support |
| Coil type | Encased coils | Better than Bonnell but less responsive than individually wrapped |
| Foam density | 1.5-1.8 lb/ft³ | Will develop body impressions within 2-3 years |
| Profile height | 11-13 inches | Standard height, compatible with most frames |
| Edge support | Basic foam encasement | Adequate but compresses over time |
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Who Actually Needs a Double Mattress?
A double mattress (54" x 75") is ideal for
- Single adults who want more sleeping width than a twin
- Teenagers graduating from a twin bed
- Guest rooms that need to accommodate one or two people occasionally
- Smaller bedrooms where a queen won't fit comfortably
- Budget-conscious shoppers stepping up from a twin without the queen price
Note: A double is generally not recommended as a primary bed for couples. At 54 inches wide, each partner gets only 27 inches, less width than a twin mattress provides for a single person.
Double Mattress Comparison: Costco vs Mattress Miracle
| Specification | Costco Sealy Double | Restonic ComfortCare Double |
|---|---|---|
| Price | $450-$800 | $1,360 |
| Coil count | 600-800 | 980 |
| Coil type | Encased | Individually wrapped |
| Expected comfortable life | 3-5 years | 8-10 years |
| Cost per year | $90-$267 | ~$95-$119 |
| Try before buying | Limited | Full showroom testing |
| Delivery | Self-transport | White glove delivery available |
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A Better Double Mattress at Mattress Miracle
Talia, our Brantford showroom specialist, helps many double-mattress shoppers: "People shopping for a double are often on a tighter budget, which makes the cost-per-year math even more important. Spending $950 on a double that lasts 8-10 years is actually cheaper annually than a $500 Costco double that needs replacing in 3-4 years."
Restonic Double Mattress Options
- ComfortCare Double ($1,360) 980 individually wrapped coils, excellent support and durability at the best value
- Revive Reflections ET Double Flippable dual-sided design with 1,200 coils for maximum lifespan
- Luxury Silk & Wool Double Natural comfort materials with 884 zoned coils for premium sleep
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.
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Call 519-770-0001How much is a Sealy double mattress at Costco?
Sealy double mattresses at Costco Canada typically range from $450 to $800 depending on the model and current promotions. In-warehouse prices tend to be lower ($450-$600) while online options may be slightly higher ($550-$800) with shipping included.
Is a Costco Sealy the same as a regular Sealy?
No. Costco sells exclusive Sealy models with unique names that aren't available at other retailers. These models are manufactured to hit warehouse price points and typically have fewer coils, lower-density foam, and thinner comfort layers than Sealy models sold at specialty mattress retailers.
Is a double mattress big enough for two people?
A double mattress (54" x 75") gives each person only 27 inches of width, less than a single twin mattress. While two adults can technically sleep on a double, it's not comfortable for nightly use by couples. A queen (60" wide) is the minimum recommended size for two people, with king (76" wide) being ideal.
What's the difference between a double and a full mattress?
Nothing, they're the same size (54" x 75"). "Double" is the Canadian term while "full" is more common in the United States. Both terms appear in Canadian retail depending on the brand.
How long does a Costco Sealy double mattress last?
The mattress structure may last 7-10 years, but the comfort layers in Costco's Sealy models typically provide good comfort for 3-5 years before noticeable body impressions develop. The lower foam densities used in warehouse-priced models compress faster than premium alternatives.
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.
Sources
- Radwan A, Fess P, James D, et al. Effect of different mattress designs on promoting sleep quality, pain reduction, and spinal alignment in adults with or without back pain. Sleep Health. 2015;1(4):257-267. DOI: 10.1016/j.sleh.2015.08.001
- Jacobson BH, Boolani A, Dunklee G, Shepardson A, Acharya H. Effect of prescribed sleep surfaces on back pain and sleep quality in patients diagnosed with low back and shoulder pain. Appl Ergon. 2010;42(1):91-97. DOI: 10.1016/j.apergo.2010.05.004
- Kovacs FM, Abraira V, Pena A, et al. Effect of firmness of mattress on chronic non-specific low-back pain. Lancet. 2003;362(9396):1599-1604. DOI: 10.1016/S0140-6736(03)14792-7
- Bergholdt K, Fabricius RN, Bendix T. Better backs by better beds? Spine. 2008;33(7):703-708. DOI: 10.1097/BRS.0b013e31816b45ac
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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.