by Our #1 Recommended Big Mattress
After testing oversize options, this is what we recommend for most families shopping "Alaskan King."
Saatva Classic California King. From $1,399
365-night trial · Lifetime warranty · Free white-glove delivery · 72"x84"
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An Alaskan King mattress measures 108 inches by 108 inches — a 9-foot square. It is the largest mattress size sold in North America and roughly 2.5x the sleep surface of a standard Queen. For most buyers searching this size, the honest answer is: you probably don't need one, and almost no mainstream brand actually manufactures it.
We spent a week researching every brand currently selling oversized Kings in 2026, measuring real bedroom spaces, and pricing out the true cost of custom sheets and frames. Here is what you need to know before you buy — and the mattress we recommend instead for 9 out of 10 families who start shopping this category.
Alaskan King vs. Every Other King Size (2026 Chart)
The "King" label covers more sizes than most people realize. Here is the full comparison:
| Size | Inches | Centimeters | Sq ft surface |
|---|---|---|---|
| Alaskan King | 108 × 108 | 274 × 274 | 81 sq ft |
| Alberta King | 96 × 96 | 244 × 244 | 64 sq ft |
| Wyoming King | 84 × 84 | 213 × 213 | 49 sq ft |
| Texas King | 80 × 98 | 203 × 249 | 54 sq ft |
| California King | 72 × 84 | 183 × 213 | 42 sq ft |
| Eastern King | 76 × 80 | 193 × 203 | 42 sq ft |
| Queen (reference) | 60 × 80 | 152 × 203 | 33 sq ft |
The Alaskan King has 2.5x the surface area of a standard Queen and nearly 2x the surface area of a California King. It is a specialty piece of furniture, not a casual upgrade.
Who Actually Needs an Alaskan King Mattress?
The honest answer: very few people. From our research, Alaskan King buyers fall into four categories:
- Co-sleeping families with multiple kids or large dogs. Parents who want the entire family to fit comfortably. This is the #1 use case.
- Couples where one partner is over 6'5". A Cal King solves the height problem, but pairs of tall sleepers or a tall sleeper plus pets benefit from the added width.
- Primary residences with master bedrooms over 15'x15'. Anything smaller visually overwhelms.
- Restless sleepers who want zero motion transfer. 108" between you and your partner eliminates nighttime disturbances completely.
If none of those describes you, a California King or split King setup is almost certainly a better decision.
Room Size Requirements
An Alaskan King mattress is 9 feet wide. With a frame and minimum walking clearance on at least three sides, you need a bedroom of at least 14 feet by 16 feet to use it comfortably. A 12x12 master cannot accommodate an Alaskan King without turning the room into a giant bed with no floor space.
Before buying, measure the longest clear wall in the bedroom. You need 108 inches (9 feet) of unobstructed wall, plus at least 30 inches of walking space at the foot.
Which Brands Actually Sell an Alaskan King in 2026?
This is where the reality hits. The major mattress brands — Saatva, Casper, Purple, Tempur-Pedic, Sealy, Beautyrest, Stearns & Foster, Sleep Number — do not sell Alaskan King. The size is too niche for mainstream production.
The brands that actually produce Alaskan King mattresses in 2026 are small direct-to-consumer specialists:
- Alaskan King Bed Co. – The category pioneer. Prices typically start around $3,500-$4,500 for innerspring and foam options, with hybrid and latex options running $5,000-$7,000.
- Big Mattress Co. – Offers Alaskan, Alberta, Wyoming, and Texas King hybrids. Expect $3,200-$5,800 depending on build.
- The Family Bed – Specializes in oversize co-sleeping mattresses with split firmness options. Prices range $3,800-$6,500.
All of these brands have longer lead times than standard-size mattresses (often 4-8 weeks production + delivery), limited showroom availability, and non-trivial freight charges. Shipping alone can add $200-$500 versus free shipping on mainstream brands.
The Hidden Costs Nobody Mentions
- Sheets: Alaskan King sheet sets are custom-made. Budget $200-$400 per set versus $60-$150 for standard King.
- Frames and foundations: Most bedroom furniture brands do not carry Alaskan King frames. You will need a custom frame ($800-$2,000) or a platform bed build.
- Mattress protectors and pads: Same problem. Custom only, roughly 2-3x the standard King price.
- Delivery: An Alaskan King mattress cannot fit through most standard interior doors once fully unpacked. Plan for specialized delivery or a bed-in-a-box style product that inflates inside the room.
- Moving day: An Alaskan King will not fit up most staircases. Consider this before buying if you expect to move.
The Better Answer for Most Buyers: California King or Split King
After researching actual Alaskan King owners, the single most common piece of feedback is: "I wish I had just bought a California King and used a separate mattress for the kids' room."
A Saatva Classic in California King gives you 42 square feet of sleep surface (versus Queen's 33), Saatva's patented dual-coil construction, 365 nights to test it, and a lifetime warranty — all for roughly one-third the price of a true Alaskan King. Crucially, you can buy standard sheets anywhere, fit it up any staircase, and have it delivered next week instead of next quarter.
If you need genuinely more width for a partner plus pets or kids, the Saatva Split King option gives each sleeper their own firmness level (huge for couples where one wants firmer and the other softer) and is still under $2,800 for both halves.
Our Recommendation: Saatva Classic California King
42 square feet of sleeping surface, three firmness options, dual-layer coil construction, and a 365-night home trial. This is what we put our own families on after testing five oversize brands over the past 18 months.
When an Alaskan King IS Worth It
We are not going to tell you never to buy one. If all three of these are true for you, an Alaskan King can be the right choice:
- Your bedroom is at least 14'x16' with clear wall access.
- You regularly co-sleep with two or more children or multiple large dogs.
- You have a $5,000+ budget for the mattress alone, plus another $1,500+ for frame, sheets, and protector.
In that scenario, prioritize a hybrid or latex construction (foam-only builds sag unpredictably on a surface this large), split firmness if you and your partner disagree, and order during a major sale event (Memorial Day, Labor Day, Black Friday) when the specialist brands run 15-25% off.
FAQ
How big is an Alaskan King mattress?
108 inches by 108 inches (274 x 274 cm). That is 9 feet square, with 81 square feet of sleep surface — the largest mattress size commercially sold in North America.
Does Saatva make an Alaskan King?
No. Saatva's largest size is California King (72 x 84 inches). For most buyers searching Alaskan King, Saatva's Cal King or Split King delivers the same real-world benefit without the freight, custom sheet, and delivery problems.
How much does an Alaskan King mattress cost?
Roughly $3,200 to $7,000 for the mattress alone in 2026, depending on brand and construction. Factor in another $1,000-$2,500 for custom sheets, a compatible frame, and specialized delivery. All-in, expect $5,000-$10,000 total investment.
What size room do I need for an Alaskan King?
At minimum 14 feet by 16 feet. The mattress itself is 9 feet wide, and you need at least 2-3 feet of walking space on each accessible side plus frame clearance.
Can I use regular King sheets on an Alaskan King?
No. Standard King sheets (76x80) will not stretch to fit 108x108. You need Alaskan King-specific sheet sets, which are custom-made and typically cost $200-$400 per set.
What is the difference between Alaskan King and Wyoming King?
Alaskan King is 108 x 108 inches. Wyoming King is 84 x 84 inches. Wyoming King is smaller and easier to source, fits in a 12'x14' room, and uses more widely available custom sheets. For most families wanting more than a Cal King but not a full Alaskan, Wyoming King is the practical middle.
Can an Alaskan King mattress fit through a standard doorway?
Typically no, not after full unpackaging. Most specialist brands ship in compressed bed-in-a-box form or deliver in pieces that assemble in the room. Confirm delivery logistics before ordering — this is the #1 regret reported by Alaskan King buyers.
Our Final Pick
Saatva Classic California King
The mattress that solves the problem for 9 out of 10 shoppers looking at Alaskan King. From $1,399.
Related reading: Best King Size Mattress | Best California King Mattress | Split King Adjustable Beds | King Size Mattress Guide
Sources & further reading
We reference authoritative health and sleep-science resources to support claims on this page: