Are you searching for a California King mattress at Costco because you want the biggest bed possible? Here is something most people get wrong about the Cal King: it is not bigger than a standard King. It is actually narrower. The California King trades width for length, and unless you are over 6 feet 2 inches tall, that trade works against you. Understanding this difference before you buy could save you from an expensive mistake that is very difficult to return.
We are Brad, Dorothy, and Talia at Mattress Miracle in Brantford, Ontario. After 37 years of fitting people to mattresses, we have seen hundreds of customers come in wanting a California King because the name sounds impressive. When we show them the actual dimensions and explain what those numbers mean for two people sharing a bed, most of them choose the standard King instead. Costco's limited Cal King selection makes this decision even more important to get right.
Quick Answer: Costco carries 2 to 4 California King models in Canada, mostly online. A Cal King is 72 by 84 inches (narrower but longer than a standard King at 76 by 80 inches). Most couples get less sleeping space with a Cal King. Quality King mattresses start around $1,455, with Cal King available by special order.
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."
California King vs Standard King: The Actual Dimensions
The name "California King" suggests something bigger, more luxurious, more spacious. The reality is more nuanced. Here are the exact measurements side by side:
| Measurement | California King | Standard King | Difference |
|---|---|---|---|
| Width | 72 inches (6 feet) | 76 inches (6 feet 4 inches) | Cal King is 4" narrower |
| Length | 84 inches (7 feet) | 80 inches (6 feet 8 inches) | Cal King is 4" longer |
| Total Area | 6,048 square inches | 6,080 square inches | Standard King has 32 sq in more |
| Per Person Width (couples) | 36 inches each | 38 inches each | Standard King gives 2" more per person |
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A standard twin mattress is 38 inches wide. When two people share a California King, each person gets 36 inches of personal space. That is less than a twin bed. On a standard King, each person gets 38 inches, which equals a full twin. Those 2 extra inches per person do not sound like much on paper, but they make a measurable difference when you are trying to sleep beside someone who moves, generates heat, or takes up more than their fair share of the bed.
Who Actually Needs a California King
The California King was designed in the 1960s in Los Angeles for tall individuals. The name comes from its geographic origin, not from some premium designation. There are specific situations where the Cal King genuinely makes sense:
You might need a Cal King if:
- You are over 6 feet 2 inches tall and sleep on your back with your feet pointing straight
- You sleep alone and value length over width
- Your bedroom is narrow and long, making a standard King too wide to fit with adequate walkway space
- You already own a California King bed frame that you do not want to replace
You probably do not need a Cal King if:
- You share the bed with a partner (you each get less space than a twin)
- You sleep on your side or in a curled position (you do not use the extra length)
- You are under 6 feet 2 inches tall (standard King provides enough length with better width)
- You want the widest possible selection of sheets, bed frames, and accessories
"I always ask couples: do you want a longer bed or a wider bed? Almost every time, they want wider. People move side to side in their sleep much more than they stretch out lengthwise. A standard King lets both people spread out without touching. A Cal King forces you closer together. There is nothing wrong with being close, but if you are buying a King-size bed, you probably want space."
What Costco Offers in California King
Costco's California King selection in Canada is limited compared to their standard King and Queen offerings. Here is what you typically find:
| Aspect | Costco Cal King | Costco Standard King |
|---|---|---|
| Models Available | 2-4 (mostly online only) | 8-12 (online and in-warehouse) |
| In-Store Testing | Rarely displayed | Usually 1-2 on floor |
| Price Premium | 10-20% more than Standard King | Base king pricing |
| Brands | Usually Beautyrest, sometimes Sealy | Beautyrest, Sealy, Serta, Novaform, Casper |
| Return Logistics | Difficult (large, heavy, niche size) | Standard process |
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The biggest problem with buying a Cal King at Costco is that you almost certainly cannot try it before buying. Costco warehouses display Queen and sometimes King mattresses. They rarely have a Cal King on the floor. You are buying based on how a completely different size felt in the store, and hoping the Cal King version of that same mattress feels identical. It usually does not, because the different dimensions change how the coils distribute your weight.
The Hidden Costs of Choosing California King
The mattress itself is just the beginning. California King is a specialty size, and everything that goes with it costs more and is harder to find:
Sheets: Cal King sheets cost $20-$50 more per set and are available in fewer colours, fabrics, and thread counts. Standard King sheets are stocked everywhere.
Bed Frame: Cal King frames are specialty items. Fewer options, higher prices, longer shipping times. Standard King frames are readily available at every furniture store.
Mattress Protector: Cal King protectors cost more and have fewer options. Some brands do not even make Cal King sizes.
Duvet/Comforter: Most "King" bedding is sized for standard King. Cal King bedding often needs to be special ordered.
Resale Value: When you eventually replace the mattress, a used Cal King is much harder to sell or donate than a standard King because fewer people have Cal King frames.
Why Standard King Is Usually the Better Choice
For 90% of the people who walk into our showroom asking about California King, the standard King is the better mattress. Here is why:
More space per person. Each sleeper gets 38 inches of width on a standard King versus 36 inches on a Cal King. When you factor in pillows, arm positioning, and natural movement during sleep, that 2-inch difference per person equals noticeably better personal space.
Better coil distribution. In a King-size Restonic ComfortCare, you get 1,440 pocket coils spread across 6,080 square inches. That is one coil per 4.22 square inches. In a Cal King version, the same coil count covers 6,048 square inches with a slightly different aspect ratio. The wider format of a standard King allows the coils to support your body more evenly when you sleep on your side, which is the most common sleep position.
Universal accessories. Every bedding store, every sheet brand, every frame manufacturer makes standard King as a primary size. Cal King is always a specialty order with fewer choices and higher prices.
Better room fit. A standard King is 76 inches wide and 80 inches long. A Cal King is 72 inches wide but 84 inches long. In most bedrooms, the extra 4 inches of length extends toward the wall where nobody notices, while the 4 fewer inches of width actually reduces the visual presence of the bed and the functional sleeping space.
Restonic King Mattresses at Mattress Miracle
Every Restonic model at Mattress Miracle is available in King size, ready for delivery. California King is available by special order with 2 to 4 week delivery. Here is the King-size pricing:
| Model | King Price | Coil Count | Key Feature |
|---|---|---|---|
| ComfortCare Dalton/Albany | $2,051 | 1,440 | TempaGel cooling, Split Comfort option |
| Revive Reflections ET | $2,895 | 1,200 | Flippable dual-sided, triple cooling |
| Luxury Silk and Wool | $2,895 | 884 | Natural silk and wool, flippable |
| Revive Tiffany Rose/Jasmine | $3,500 | 1,188 | Talalay Copper Latex, hand-tufted |
| Revive St Charles/Elizabeth | $3,995 | 1,188 | 15" flagship, maximum comfort |
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Every King mattress includes Split Comfort option, so couples can have different firmness on each side. One partner gets Firm while the other gets Plush, on the same mattress. This is something Costco cannot offer at any price.
A King mattress has roughly 50% more surface area than a Queen. The coil count needs to increase proportionally to maintain the same support density. The Restonic ComfortCare King has 1,440 pocket coils versus 1,222 in the Queen. That maintains approximately the same coil density per square inch. Most Costco King mattresses have 800 to 1,000 coils, which means each coil covers a significantly larger area than on the Queen version. The result is less precise support, faster wear, and more body impression formation.
Frequently Asked Questions
Does Costco sell California King mattresses in Canada?
Costco carries a limited selection of California King mattresses in Canada, primarily online. In-warehouse availability is inconsistent because Cal King is a niche size that represents less than 10% of king-size mattress sales in Canada. The selection is typically limited to 2 to 4 models compared to 10 or more standard King options.
What is the difference between California King and regular King?
A California King measures 72 inches wide by 84 inches long. A standard King measures 76 inches wide by 80 inches long. The Cal King is 4 inches narrower but 4 inches longer. Most couples find the standard King more comfortable because the extra 4 inches of width gives each person 38 inches of personal space compared to 36 inches on the Cal King.
Is a California King mattress worth the extra cost?
California King mattresses cost 10 to 20 percent more than standard King in the same model because they are a specialty size with lower production volume. Cal King sheets, bed frames, and accessories also cost more and are harder to find. Unless you are over 6 feet 2 inches tall and sleep alone, the standard King provides better value and more sleeping space per person.
Can I try a California King mattress before buying?
Costco does not typically display Cal King mattresses in their warehouses. At Mattress Miracle, we carry King-size mattresses for in-store testing and can special order California King in any Restonic model. We ensure you test the exact firmness and comfort before committing.
Does Restonic make California King mattresses?
Restonic can produce California King mattresses by special order through Mattress Miracle. Since Restonic mattresses are made in Canada, special orders typically arrive within 2 to 4 weeks. You get the same hand-tufted construction, pocket coil system, and premium materials in the Cal King size. Call (519) 770-0001 to discuss Cal King options.
Find Your King-Size Mattress
Whether you need standard King or California King, visit Mattress Miracle to test the Restonic lineup. Brad, Dorothy, and Talia will help you determine which size, firmness, and model fits your body and bedroom. Split Comfort available so couples each get their ideal feel.
Mattress Miracle
441 1/2 West Street, Brantford, Ontario N3R 3V9
(519) 770-0001 | mattressmiracle.ca
Mon-Wed 10-6 | Thu-Fri 10-7 | Sat 10-5 | Sun 12-4
White glove delivery to Hamilton, Burlington, Mississauga, Toronto, Kitchener, Waterloo, Guelph, Cambridge, St. Catharines, Niagara Falls, London, Barrie, and Oshawa
California king mattresses at Costco are rarely available in-store and typically must be ordered online with extended delivery times. Mattress Miracle at 441½ West Street in Brantford can order California king sizes in most Restonic models. Dorothy notes that California king is 4 inches narrower but 4 inches longer than a standard king, making it better for taller sleepers but providing less width for couples. The choice between king and California king depends on bedroom dimensions and sleeper height. Call (519) 770-0001 for Cal king availability.
Shop: King Mattresses at Mattress Miracle
Find Your Perfect Mattress at Mattress Miracle
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
Does Costco sell California King mattresses in Canada?
Costco carries a limited selection of California King mattresses in Canada, primarily online. In-warehouse availability is inconsistent because Cal King is a niche size that represents less than 10% of king-size mattress sales in Canada. The selection is typically limited to 2 to 4 models compared to 10 or more standard King options.
What is the difference between California King and regular King?
A California King measures 72 inches wide by 84 inches long. A standard King measures 76 inches wide by 80 inches long. The Cal King is 4 inches narrower but 4 inches longer. Most couples find the standard King more comfortable because the extra 4 inches of width gives each person 38 inches of personal space compared to 36 inches on the Cal King.
Is a California King mattress worth the extra cost?
California King mattresses cost 10 to 20 percent more than standard King in the same model because they are a specialty size with lower production volume. Cal King sheets, bed frames, and accessories also cost more and are harder to find. Unless you are over 6 feet 2 inches tall and sleep alone or with a partner who does not need extra width, the standard King provides better value and more sleeping space per person.
Can I try a California King mattress before buying?
Costco does not typically display Cal King mattresses in their warehouses. You would be buying based on the feel of a different size (usually Queen). At Mattress Miracle, we carry King-size mattresses for in-store testing and can special order California King in any Restonic model. We ensure you test the exact firmness and comfort before committing.
Does Restonic make California King mattresses?
Restonic can produce California King mattresses by special order through Mattress Miracle. Since Restonic mattresses are made in Canada, special orders typically arrive within 2 to 4 weeks. You get the same hand-tufted construction, pocket coil system, and premium materials in the Cal King size. Call (519) 770-0001 to discuss Cal King options.
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.