Updated Oct 26, 2026 · 8 makers’ own size lists checked · findings from 2 independent testing sites · How we pick
108 × 108 inches 274.3 × 274.3 cm
An Alaskan king is 108 inches wide and 108 inches long: a 9-foot square, the largest common US mattress size. It’s 32″ wider and 28″ longer than a king.
Commonly used for: Families who co-sleep with children or pets; very large bedrooms where a king looks small.
We’ve gathered every Alaskan king mattress we could find into one list: 16 from 8 makers, each sold in exactly 108 × 108 inches.
Measure inside the frame and enter the inches.
Each one is sold in exactly 108 × 108 inches, checked against the maker’s own size list.
Big Mattress ClassicBig Mattress Co.Reviewed by 2 expert sitesLongest trial
Luxe Alaskan King MattressNolah365 nights to try itMost owner reviews
12″ Kingship Comfort Oversized King Mattress MediumRest Right Mattress3 owner reviewsVerified in 108 × 108″The maker calls it “Alaskan King”
Best for: Family beds and co-sleeping Tested by experts
A 108″ × 108″ (9 ft square) hybrid, 13″ tall, rated 6 to 7 out of 10 on Nolah's scale.
Good to know: Only one size, and it needs a matching Alaskan king frame.
Verified in 108 × 108″The maker calls it “Alaskan King”
Best for: Texas, Wyoming and Alaskan kings
A three-piece coil mattress in nine oversized sizes, including 80″ × 98″ Texas king, 84″ × 84″ Wyoming king and 108″ × 108″ Alaskan king, with five comfort tops.
Good to know: It can't be returned: no sleep trial, just one comfort exchange, and no cancelling after production starts.
Made to order in 108 × 108″
Best for: Alaskan, Wyoming and Texas kings Tested by experts
Made to order for big family beds, with parts you can replace one at a time.
Good to know: Its refund wording conflicts with the 100-night trial, so get the terms in writing. “Hybrid” here means air pods, not coils.
Made to order in 108 × 108″
Best for: A plusher oversized bed Tested by experts
The plusher, 13″ version of the Classic for Alaskan, Wyoming and Texas kings.
Good to know: Same refund-wording conflict as the Classic, and no owner reviews we could verify yet.
Made to order in 108 × 108″The maker calls it “Alaskan King Original™”
Best for: Firm foam for giant beds
An 11″ firm foam mattress made in eight oversize sizes from 96″ × 96″ up to 156″ × 108″, and the company will make other sizes on request.
Good to know: There's no trial: once it ships, it can't be returned.
Made to order in 108 × 108″The maker calls it “Alaskan King Original™”
Best for: Pick your feel, oversize
A 12″ foam-and-latex bed with a cashmere cover, offered soft, medium or firm in every oversize size from 96″ × 96″ to 156″ × 108″.
Good to know: No trial or returns once it ships, and delivery is curbside unless you pay for threshold service.
Made to order in 108 × 108″The maker calls it “Alaskan King Original™”
Best for: Two feels, full service
A 15″ two-sided bed, firm on one side and medium on the other, with white-glove setup and three years of yearly flip-and-clean visits.
Good to know: Like the other models, it can't be returned once shipped.
Made to order in 108 × 108″The maker calls it “Alaskan King”
Best for: Made-to-you, and oversized
A 10″ bed whose foam layers are picked for your posture, also offered in Wyoming, Texas, Alberta and Alaskan King.
Good to know: Final sale: there is no sleep trial.
Made to order in 108 × 108″The maker calls it “Alaskan King”
Best for: Oversized family beds
A 13.5″ modular hybrid in giant sizes from Wyoming King 84 × 84 to 144 × 84.
Good to know: Ships in several boxes you assemble; the Athlete Bed's inches aren't stated.
Made to order in 108 × 108″The maker calls it “Alaskan King”
Best for: Giant beds in three pieces
A 12″ soft foam mattress in Alaskan, Texas, Alberta and family-bed sizes up to 144″ × 84″, built as three pieces you can move or replace one at a time.
Good to know: No returns once it ships, and the store doesn't say which number is width.
Made to order in 108 × 108″The maker calls it “Alaskan King”
Best for: Giant beds in three pieces
A 12″ medium foam mattress in Alaskan, Texas, Alberta and family-bed sizes up to 144″ × 84″, built as three pieces you can move or replace one at a time.
Good to know: No returns once it ships, and the store doesn't say which number is width.
Made to order in 108 × 108″The maker calls it “Alaskan King”
Best for: Giant beds in three pieces
A 12″ firm foam mattress in Alaskan, Texas, Alberta and family-bed sizes up to 144″ × 84″, built as three pieces you can move or replace one at a time.
Good to know: No returns once it ships, and the store doesn't say which number is width.
Made to order in 108 × 108″The maker calls it “Alaskan King”
Best for: Wyoming or Alaskan king in foam
A 10″ memory foam mattress sold in 84″ × 84″, 108″ × 108″ and a 48″ × 75″ three-quarter, among 13 sizes.
Good to know: Delarkin's Texas King is 80″ × 95″, not the 80″ × 98″ some others sell; the RV King page gives no clear inches.
Made to order in 108 × 108″The maker calls it “Alaskan King”
Best for: Lower-cost oversized foam bed
An 8″, three-layer memory foam mattress made in 84″ × 84″, 108″ × 108″, a 48″ × 75″ three-quarter and 13 sizes in all.
Good to know: Delarkin's Texas King is 80″ × 95″, not 80″ × 98″.
Made to order in 108 × 108″The maker calls it “Alaskan King”
Best for: Firm foam for an Alaskan king
A firm 10″ memory foam mattress; the Alaskan King page lists 108″ × 108″.
Good to know: Most other Rock size pages list inches that don't match the size name, so confirm any size by phone before ordering.
Made to order in 108 × 108″The maker calls it “Alaskan King”
Best for: Thin, low-cost odd sizes
A 6″ two-layer foam mattress in 84″ × 84″, 108″ × 108″, a 48″ × 75″ three-quarter and 13 sizes in all.
Good to know: Prices on the Outback pages are inconsistent and the Alaskan King says call for pricing; its short queen is listed as 60″ × 75″.
An Alaskan king is not a standard king or California king. Plan for a dedicated 108 × 108 foundation and matching bedding. We may earn a commission from qualifying purchases. How we choose and research
| Detail | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Hybrid | Hybrid | Foam or air-pod hybrid | Foam or air-pod hybrid | Foam | Foam | Foam | Latex | Hybrid | Foam | Foam | Foam | Memory foam | Memory foam | Memory foam | Memory foam |
| Feel | Luxury firm (6-7/10 per Nolah) | Duo Latex, Duo Latex Plus, Duo Memory, Duo Memory Plus, Duo Performance | Foam, or adjustable air pods | Plush foam, or adjustable air pods | Firm | Soft, Medium, Firm | Two-sided: firm side and medium side | Built to the sleeper via Essentia ID posture assessment | Adjustable: flippable, removable layers | Soft | Medium | Firm | Not published | Not published | Firm | Not published |
| Height in Alaskan king | 13″ | 13″ or 14″ or 15″ | 12″ | 13″ | 11″ | 12″ | 15″ | 10″ | 13.5″ | 12″ | 12″ | 12″ | 10″ | 8″ | 10″ | 6″ |
| How it’s sold | Ready-made | Ready-made | Made to order | Made to order | Made to order | Made to order | Made to order | Made to order | Made to order | Made to order | Made to order | Made to order | Made to order | Made to order | Made to order | Made to order |
| Returns | 365-night trial | 100-night trial | 100-night trial | 100-night trial | Returnable | Returnable | Returnable | Returnable | Returnable | No returns | No returns | No returns | 90-night trial | 90-night trial | 90-night trial | 90-night trial |
| Good fit if | Family beds and co-sleeping | Texas, Wyoming and Alaskan kings | You have a purpose-built oversized bed: Alaskan, Wyoming or Texas king | You have a purpose-built oversized bed and want a plusher feel | Firm foam for giant beds | Pick your feel, oversize | Two feels, full service | Made-to-you, and oversized | Oversized family beds | Giant beds in three pieces | Giant beds in three pieces | Giant beds in three pieces | Wyoming or Alaskan king in foam | Lower-cost oversized foam bed | Firm foam for an Alaskan king | Thin, low-cost odd sizes |
| Independent tests | 1 reviewer | Not yet | 2 reviewers | 1 reviewer | Not yet | Not yet | Not yet | Not yet | Not yet | Not yet | Not yet | Not yet | Not yet | Not yet | Not yet | Not yet |
| Owner feedback | Not yet | Not yet | Not yet | Not yet | Related model, not this exact one | Related model, not this exact one | Not yet | Not yet | Not yet | Not yet | Merchant-selected comments | Merchant-selected comments | Not yet | Not yet | Not yet | Not yet |
| Buy | See price | See price | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote | Get a quote |
A custom maker can build an Alaskan king mattress to your exact inches, including rounded or cut corners. Stores rarely keep this size on the floor.
How it compares with the sizes people mix it up with.
| Size | Inches | Sleeping area | Compared with Alaskan king |
|---|---|---|---|
| Alaskan king | 108 × 108 | 81 sq ft | This size |
| King | 76 × 80 | 42.2 sq ft | 32″ narrower, 28″ shorter |
| Wyoming king | 84 × 84 | 49 sq ft | 24″ narrower, 24″ shorter |
| California king | 72 × 84 | 42 sq ft | 36″ narrower, 24″ shorter |
| Queen | 60 × 80 | 33.3 sq ft | 48″ narrower, 28″ shorter |
Only Alaskan king sheets fit. Some sellers sell them with the mattress.
Use a frame made for 108 × 108 with center supports to the floor. Standard king frames won’t work.
Check your base
Alaskan King Bed CompanyEva Cotton Sheet SetEvery Alaskan King sizeOrganic cotton sateen sheets cut for eight Alaskan King sizes, from a 96″ × 96″ Mini to a 156″ × 108″ Biggie, with four king pillowcases.Sheets
Alaskan King Bed CompanyKoda Bamboo Sheet SetBamboo for Alaskan KingsBamboo sateen sheets in the same eight Alaskan King sizes, 96″ × 96″ up to 156″ × 108″.Sheets
Mattress InsiderOversized Sheets for Giant Bed MattressesGiant beds, 13.5″ mattressA 600-thread-count cotton sateen set in eight oversized sizes, from 80″ × 98″ Texas King to 144″ × 84″ Family Bed.Sheets
SGI Bedding100% Bamboo Viscose Oversized Sheet SetBamboo sheets for family bedsBamboo viscose sets for seven oversized beds, from an 84″ × 84″ Wyoming King to a 144″ × 84″ Family XL.Sheets
Alaskan King Bed CompanyThe Platform Bed (Alaskan King)Fits every Alaskan King sizeA low 13″ upholstered hardwood platform, no headboard, built in North Carolina in eight Alaskan King sizes from 96″ × 96″ up to 156″ × 108″.Platform bed
Alaskan King Bed CompanyThe Haven Storage BedStorage for an Alaskan KingWave-shaped upholstered headboard and a storage bench compartment, in seven Alaskan King sizes up to 144″ × 108″.Bed frame
Alaskan King Bed CompanyThe Kodiak BedTall headboard, giant sizesA 60″-tall upholstered headboard frame in all eight Alaskan King sizes, built from maple and poplar.Bed frame
Alaskan King Bed CompanyThe Archie BedTufted headboard, Alaskan sizesArched, diamond-tufted 72″-tall headboard on a doweled hardwood base, in six Alaskan King sizes up to 120″ × 108″.Bed frameAn Alaskan king is not a standard king or California king. Plan for a dedicated 108 × 108 foundation and matching bedding.
108 × 108 inches, 9 feet square. That’s about 81 square feet of sleeping space, more than double a queen.
Yes, by a lot: 36″ wider and 24″ longer than a California king (72 × 84).
Among named sizes, nothing in common use. Custom makers can build larger beds to order.
Mostly online from a few specialist brands, or from a local mattress factory. Every one we’ve found in exact 108 × 108 is listed on this page.
Mark a nine-foot square on the floor with removable tape, then check walking paths, drawers and doors. Ask how the mattress and foundation are delivered and assembled, including any stair or doorway limits. An Alaskan king is not a standard king or California king. Plan for a dedicated 108 × 108 foundation and matching bedding.
13 of the 16 Alaskan king mattresses we list can be returned under the seller’s trial. Made-to-order mattresses often can’t. Each one’s return terms are in its details.
Prices change often, so we link to each seller instead of listing them. Odd sizes are often priced at or above the nearest standard size, and made-to-order ones usually cost more.
Usually not. Owner feedback is about the mattress model, often in a more common size. Each summary says whether it’s about this exact model, and links to the source.
Photo: Nolah. May show another size.
Nolah
Luxe Alaskan King Mattress
Good to know: Only one size, and it needs a matching Alaskan king frame.
9ft x 9ft hybrid built as a shell with a topper attachment and core quadrants: GlacioTex cooling cover and quilted foam, gel swirl (PCM) foam and soft Supreme Response foam in the topper, firm Supreme Response foam over 8in HDMax 13.5-gauge pocketed coils in the core, fabric border.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
365 nights; 30-night break-in (one PDP bullet still says '120-night sleep trial')
Engineered Sleep
Duo Epic
Good to know: It can't be returned: no sleep trial, just one comfort exchange, and no cancelling after production starts.
An oversized mattress in three pieces: a one-piece comfort top over a Duo Support base made in two halves, held together by the brand's CLING attachment. Each support half is pocketed coils plus 1.5″ HR foam, with a slightly softer 'AdaptFoam' side and a firmer side, so each half can be flipped to a different feel. Comfort tops: 2″ (Latex, 13″) or 3″ (Latex Plus, 14″) natural latex, 6–8 or 5–7 out of 10 on Engineered Sleep's scale; 2″ memory foam (Memory, 13″, 6–8 out of 10); 2″ memory foam plus 2″ natural latex (Memory Plus, 15″, 3–5 out of 10); or 1.5″ Avena HR foam over 1.5″ Serene HR foam (Performance, 14″, 4–6 out of 10). Organic cotton cover. Ships in 3 boxes.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
No 100-night trial (treated as a custom mattress); one comfort exchange allowed between night 30 and night 45. Orders can't be cancelled once production starts.
Photo: Big Mattress Co.. May show another size.
Big Mattress Co.
Big Mattress Classic
Good to know: Its refund wording conflicts with the 100-night trial, so get the terms in writing. “Hybrid” here means air pods, not coils.
An oversized mattress with replaceable components. Choose foam or the air-pod version; its “Hybrid” uses air pods, not pocket coils.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
100-night trial advertised. The trial page promises free pickup after use, but the refund policy requires unused condition and original packaging and excludes sale items. Obtain written confirmation of applicable terms.
Photo: Big Mattress Co.. May show another size.
Big Mattress Co.
Big Mattress Premier
Good to know: Same refund-wording conflict as the Classic, and no owner reviews we could verify yet.
An oversized mattress with replaceable foam components and a foam or adjustable air-pod configuration.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
100-night trial advertised. Conflicting refund-policy wording requires written clarification of used-mattress and sale-item eligibility before purchase.
Photo: Alaskan King Bed Company. May show another size.
Alaskan King Bed Company
The Original
Good to know: There's no trial: once it ships, it can't be returned.
Firm all-foam oversize mattress, handcrafted one at a time in the USA: a 2″ layer of HyperCool foam (the brand's memory-foam-like material) over the brand's PostureSupport foam base, under a quilted organic cotton cover with a woven border. Ships in one piece, folded in half to fit through a standard doorway. CertiPUR-US certified foams.
We may earn a commission if you buy.
Disliked Owners of the Alaskan King Mini said delivery was the weak point: the finished bed has to be taken once it is made, and the carrier leaves it at the door. Source ↗
None. Mattresses can't be returned or exchanged once shipped
Photo: Alaskan King Bed Company. May show another size.
Alaskan King Bed Company
The Royale
Good to know: No trial or returns once it ships, and delivery is curbside unless you pay for threshold service.
Foam-and-latex oversize mattress: a 2″ HyperCool comfort layer and a 2″ natural latex layer over the PostureSupport foam base, under a quilted cashmere cover with organic cotton. Made to order in soft, medium or firm, handcrafted in the USA and shipped in one piece folded in half.
We may earn a commission if you buy.
Liked A Mini owner described the mattress as nicely firm. Source ↗
Disliked Owners of the Alaskan King Mini said delivery was the weak point: the finished bed has to be taken once it is made, and the carrier leaves it at the door. Source ↗
None. Mattresses can't be returned or exchanged once shipped
Photo: Alaskan King Bed Company. May show another size.
Alaskan King Bed Company
The Grand Royale
Good to know: Like the other models, it can't be returned once shipped.
The brand's top, two-sided oversize mattress: one side firm and the other medium, built with natural latex and HyperCool foam under a cashmere cover. Includes white-glove in-home delivery and setup, packaging removal, and a 3-year care plan in which the company visits once a year to flip, rotate and clean the mattress.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
None. Mattresses can't be returned or exchanged once shipped
Photo: Essentia. May show another size.
Essentia
ProCor P1 Active Custom Mattress
Good to know: Final sale: there is no sleep trial.
Custom performance bed built on the Dormeuse REM9: Essentia's Essentia ID process picks the Beyond Latex organic foam variations for your posture, so layers differ per order. EMF Protection Foam is included. Comes with in-home delivery.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
None: final sale (built to the sleeper's specifications)
Photo: Mattress Insider. May show another size.
Mattress Insider
Giant Bed (Alaskan, Texas, Wyoming, Alberta King; Family Bed; Athlete Bed)
Good to know: Ships in several boxes you assemble; the Athlete Bed's inches aren't stated.
13.5″ modular oversized hybrid made in South Carolina, shipped in several boxes: quilted organic cotton cover, cooling gel memory foam, latex, Aireflow transition foam and individually encased coils. Base pieces sit side by side (a Texas King is two 40 × 98 pieces).
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
365-day guarantee
Photo: Rest Right Mattress. May show another size.
Rest Right Mattress
12″ Kingship Comfort Oversized King Mattress Soft
Good to know: No returns once it ships, and the store doesn't say which number is width.
12″ oversize foam mattress made to order in the USA as a three-piece design (the pieces can be moved separately or replaced later, and the comfort layer can be swapped instead of buying a new mattress). Graphene-infused cooling foam over a high-density poly foam base under a quilted cover; CertiPUR-US foam. The Soft version adds a 2″ natural Dunlop latex layer.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
None. All mattress sales final; no returns or cancellation once shipped
Photo: Rest Right Mattress. May show another size.
Rest Right Mattress
12″ Kingship Comfort Oversized King Mattress Medium
Good to know: No returns once it ships, and the store doesn't say which number is width.
12″ oversize foam mattress made to order in the USA as a three-piece design (the pieces can be moved separately or replaced later, and the comfort layer can be swapped instead of buying a new mattress). Graphene-infused cooling foam over a high-density poly foam base under a quilted cover; CertiPUR-US foam.
We may earn a commission if you buy.
Liked A buyer of the oversized family size said the price was far below other sellers and was happy with the quality and service. Source ↗
None. All mattress sales final; no returns or cancellation once shipped
Photo: Rest Right Mattress. May show another size.
Rest Right Mattress
12″ Kingship Comfort Oversized King Mattress Firm
Good to know: No returns once it ships, and the store doesn't say which number is width.
12″ oversize foam mattress made to order in the USA as a three-piece design (the pieces can be moved separately or replaced later, and the comfort layer can be swapped instead of buying a new mattress). Graphene-infused cooling foam over a high-density poly foam base under a quilted cover; CertiPUR-US foam.
We may earn a commission if you buy.
Liked A buyer of the oversized family size said the price was far below other sellers and was happy with the quality and service. Source ↗
None. All mattress sales final; no returns or cancellation once shipped
Delarkin
The Oasis
Good to know: Delarkin's Texas King is 80″ × 95″, not the 80″ × 98″ some others sell; the RV King page gives no clear inches.
Delarkin's top all-foam model, 10″ thick: two layers of gel-infused memory foam over five layers of polyurethane foam, including a convoluted (egg-crate) layer for airflow. Hand-built in Delarkin's South Carolina factory and shipped roll-packed in a box, with a removable, washable 100% cotton zip cover. Any size or shape can be made to order.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
90 nights; switch models or return for a full refund
Delarkin
The Summit
Good to know: Delarkin's Texas King is 80″ × 95″, not 80″ × 98″.
Delarkin's most popular model, 8″ thick: a three-layer design with soft memory foam on top over support foam base layers, described as not too firm and not too soft. Hand-built in Delarkin's South Carolina factory and shipped roll-packed in a box, with a removable, washable 100% cotton zip cover. Any size or shape can be made to order.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
90 nights; switch models or return for a full refund
Delarkin
The Rock
Good to know: Most other Rock size pages list inches that don't match the size name, so confirm any size by phone before ordering.
A firm 10″ model: The Oasis with extra layers of firm support foam, aimed at stomach sleepers and big and tall sleepers who bottom out. Memory foam top over polyurethane support foam. Hand-built in Delarkin's South Carolina factory and shipped roll-packed in a box, with a removable, washable 100% cotton zip cover. Any size or shape can be made to order.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
90 nights; switch models or return for a full refund
Delarkin
The Outback
Good to know: Prices on the Outback pages are inconsistent and the Alaskan King says call for pricing; its short queen is listed as 60″ × 75″.
Delarkin's value model, 6″ thick: two supportive foam layers with a memory foam top, in a cotton-blend cover. Pitched for guest rooms, campers and antique or odd-size beds. A 30-day trade-in lets you upgrade by paying the price difference plus shipping. Hand-built in Delarkin's South Carolina factory and shipped roll-packed in a box, with a removable, washable 100% cotton zip cover. Any size or shape can be made to order.
We may earn a commission if you buy.
We haven’t found owner reviews we can verify yet.
90 nights; switch models or return for a full refund
