Alaskan King Beds: What They Are and Where to Find One (2026)

An Alaskan king bed is the largest standardized mattress size on the market — roughly 108 inches by 108 inches, big enough for two adults to each sleep with the personal space of a queen bed. It’s not a size you’ll find in a typical furniture showroom, and shopping for one comes with real logistical questions: does it fit through your door, does a standard bedroom even have room for it, and where do you actually buy a frame that size. In 2026, more specialty and made-to-order manufacturers carry Alaskan king frames and mattresses than in past years, but it’s still a niche, largely custom-order category rather than a shelf item.

Alaskan King vs. Other Oversized Sizes

The naming around oversized beds is inconsistent across brands, so dimensions matter more than the name on the label. A standard king is 76″ x 80″. A California king is 72″ x 84″ — narrower but longer. A Wyoming king (also called an Alaskan king by some manufacturers, confusingly) is typically 84″ x 84″. The true Alaskan king, as most specialty mattress makers define it, is 108″ x 108″ — a full 9 feet by 9 feet, roughly the combined width of two California kings pushed together.

Does an Alaskan King Actually Fit Your Room

This is the question that ends most Alaskan king purchases before they start. At 9 feet by 9 feet, the mattress alone needs a room with at least 12×12 feet of floor space to leave walking room on all sides, and that’s before accounting for a frame, headboard, nightstands, or a dresser. Most primary bedrooms in standard US homes — even generously sized ones — struggle to comfortably fit this size once the frame and walking clearance are factored in. Measure your actual room, including doorway width and any hallway turns the mattress needs to navigate during delivery, before ordering.

Who an Alaskan King Actually Makes Sense For

This size is aimed at a narrow set of buyers: couples who each want the sleeping space of a full queen without touching a partner, co-sleeping families with multiple young children, people who share a bed with large dogs, or owners of large custom homes with primary suites built around a statement bed. If your motivation is simply “more room than a king,” a California king or a Wyoming king (84″x84″) is a far more practical and widely available upgrade before jumping to a full Alaskan king.

Mattress and Frame Sourcing

Because this size falls outside standard manufacturing runs, most Alaskan king mattresses are made to order by specialty manufacturers rather than sold off-the-shelf on Amazon or in mattress showrooms. The same applies to frames — you’re generally looking at custom furniture builders or a small number of specialty retailers rather than mainstream brands like Zinus or Novogratz, which don’t currently manufacture at this size. Expect longer lead times (often 4-8 weeks) and meaningfully higher prices than even a California king.

Bedding and Sheets

Standard king sheets will not fit an Alaskan king mattress — you’ll need sheets specifically listed for 108×108 dimensions, which are sold by the same specialty retailers that carry the mattresses. Some buyers work around this by using two California king comforters side by side rather than sourcing a single oversized comforter, which is often cheaper and easier to find.

Delivery and Assembly Considerations

Because of the sheer size, most Alaskan king mattresses and frames ship in sections or as a mattress that must be assembled/zipped from multiple foam pieces on-site, since a single 9×9 foot mattress usually can’t navigate a standard doorway or stairwell in one piece. Confirm with the manufacturer exactly how the product will be delivered and whether professional installation is included, since this is not typically a DIY unboxing like a standard bed-in-a-box mattress.

Frame Construction for Oversized Beds

A frame built for a mattress this large needs meaningfully more structural support than a standard king frame — most Alaskan king frames use a center support system with multiple additional legs rather than the simple perimeter-plus-center-rail design common on standard kings. Without adequate center bracing, a mattress this size can sag noticeably in the middle over time, especially with two adults sleeping on opposite sides. When custom-ordering a frame, ask the builder specifically how many support points the design uses and whether it’s been built at this scale before — this is not a size where a first-time custom build is a good place to cut costs.

Cost Breakdown: What You’re Actually Paying For

The premium on an Alaskan king isn’t just more raw materials. Because these are made to order in small batches rather than mass-produced, you’re paying for custom tooling, more complex quality control on components that aren’t standardized industry-wide, and often white-glove delivery and setup that a standard mattress-in-a-box skips entirely. Buyers should budget for the mattress, the frame, custom bedding, and delivery/setup as four largely separate line items, since very few sellers bundle all of it the way a standard king purchase would.

Alternatives Worth Considering First

Before committing to a full custom order, it’s worth testing whether a more modest upgrade solves the actual problem. Two California king mattresses pushed together (sometimes called a split Alaskan king) can approximate the width of a true Alaskan king using two standard, readily available mattresses — each partner even gets an independently adjustable mattress firmness, which isn’t possible with a single oversized mattress. This split approach is significantly cheaper, ships faster, and uses standard bedding sizes with a simple bridge/connector piece, making it the more practical choice for most buyers who are drawn to the idea of an Alaskan king mainly for the extra space.

Common Mistakes to Avoid

Buyers most often go wrong by assuming “Alaskan king” is a standardized industry term (it isn’t — always confirm exact dimensions with the seller), underestimating room size requirements, forgetting that standard bedding won’t fit, and not accounting for the extended lead time on a made-to-order product. If you’re on the fence about whether you need the full 108×108 size, sizing down to a Wyoming or California king first — or trying the two-mattress split approach — is a far easier and cheaper way to test whether the extra space actually improves your sleep.

Alaskan King at a Glance

Browse the full beds hub for more sizing options, or if a true Alaskan king turns out to be more room than your space or budget allows, compare our mattresses hub and bed frames hub for California king and standard king options. See our full bed sizes and dimensions guide for a side-by-side of every standard size. Couples specifically wanting more personal sleeping space without going fully custom should also look at our mattresses for side sleepers page, since sleep position often matters more than raw mattress width. For general buying philosophy, see how we test.

Written by

Sophie Laurent

Beds & Bedroom Editor

Sophie Laurent is TalkBeds' Beds & Bedroom Editor. With more than ten years covering home and furniture, she leads everything on the site that isn't the mattress itself: bed frames, platform beds, headboards, bunk and kids' beds, sizing, and the interiors decisions… Full profile & sources →