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If you’re looking to upgrade your mattress, the Alaskan king will definitely give you more space. One of the biggest mattresses on the market, it offers plenty of room for you to get comfy, particularly if you’re sharing a bed with your partner, kids, pets, or all three.

Wondering if it’s the right buy for your bedroom? Here’s everything you need to know about this mega-size mattress and the best choices available.

The Alaskan king mattress is the biggest oversized king bed you can buy. It measures in at 9 feet x 9 feet (108 inches x 108 inches). That’s much wider and longer than the California king bed — a more common purchase — which comes in at 72 inches wide and 84 inches long.

The Wyoming king, another square mattress, measures just 84 inches by 84 inches.

Your go-to mattress brand likely doesn’t sell this oversized mattress, and most aren’t sold in stores.

Instead, look for specialty mattress brands that advertise for the Alaskan king, which often are custom made. For ideas on where to start shopping, check out the top three Alaskan king mattresses below.

There aren’t many Alaskan king mattresses on the market, but to help you narrow things down to the best of the best, here’s what we considered:

  • Safety. We only included mattresses that meet federal flammability requirements.
  • Transparency. All three brands we featured are transparent about what their mattresses are made of and how they’re manufactured.
  • Options. We picked three price tiers and chose mattresses at different firmness levels so you can find what’s best for you.
  • Brand reputation. We checked Better Business Bureau ratings (if available) and made sure each brand didn’t have any pending lawsuits related to consumer safety.

Pricing guide

  • $ = under $3,000
  • $$ = $3,000–$5,000
  • $$$ = over $5,000

Best customizable Alaskan king mattress

Von Viva Oversized Mattresses

  • Price: $–$$$
  • Type: Memory foam and latex
  • Height: 10 or 11 inches

The luxury brand Von Viva sells several options so you can customize this mattress to your Zzz’s needs.

First, choose from the Rundle (with a memory foam or latex topper), Kona (like the Rundle, but with three layers you can adjust), Denali (another step up from the Kona), or the Everest, featuring natural materials.

You can customize both the left and right sides of all of these mattresses, as well as the materials under the hips and shoulders for the Denali — great for anyone who needs something firm for the upper body and a little softer under the hips.

Buy Von Viva Oversized Mattresses online.

Best cooling Alaskan king mattress

Mattress Insider Alaskan King Mattress

  • Price: $$$
  • Type: Hybrid
  • Height: 13.5 inches

This mattress includes a 2-inch cooling memory foam layer to help you maintain an ideal temperature as you sleep. Breathable cotton encases the memory foam layer, along with a layer of latex. Below that, there’s a layer of pocketed coils for extra support.

The rest of the nearly 14-inch mattress consists of foam, with the option to sleep on a firm or very firm side. All parts get zipped together, too, so you don’t have to worry about uncomfortable shifting.

The mattress comes in three pieces so it’s easier to move or rotate.

Buy the Mattress Insider Alaskan King Mattress online.

Most comfortable Alaskan king mattress

Rest Right Alaskan Mattress

  • Price: $$
  • Type: Memory foam or memory foam and latex
  • Height: 12 inches

Choose from a soft, medium, or firm mattress for your best comfort fit.

Unlike other mattresses on this list, the Rest Right Alaskan king mattress gets made and delivered in one piece, covered in a cotton fabric. Under the cotton, you’ll get a mix of memory foam (including a cooling technology) and poly-foam if you choose the medium or firm bed, plus a layer of latex if you go with the soft version.

You can also opt to buy a set of sheets and a bed frame with your purchase.

Buy the Rest Right Alaskan King Mattress online.

The two most important things to consider before you purchase such a huge mattress are:

  • Will this bed fit in your room? What about through your doorway?
  • Is it worth the price tag?

Alaskan king mattresses are jumbo, so they may be hard to situate in your home — especially if you buy one that comes all in one piece. The box it comes in will be pretty big and may weigh up to about 300 pounds, according to some manufacturer sites.

Also, keep in mind that these mattresses cost more to make, so you’ll be shelling out more money than you would for a regular king bed. You’ll also pay more for sheets, blankets, comforters, and a bed frame.

If you need the extra space and you want to feel like you have the bed to yourself, despite your partner, kids, or dog joining, then the Alaskan king mattress could easily fulfill those dreams and help you catch more Zzz’s.

Lastly, since these beds are custom made, you likely won’t get a free trial period as you might with a regular-sized mattress. Keep this in mind and check return policies before you click “buy.”

Your best bet for an Alaskan king frame is to purchase it from the seller of your mattress (if they offer frames too). You won’t be able to find them in stores. Some manufacturers also suggest placing the mattress right on the floor or getting a custom-built bed frame from a local carpenter.

Bedding, including sheets, blankets, and duvets, on the other hand, are easier to find for the Alaskan king than the frame is. While the options are more limited than standard bed sizes, you can find most of the bedding on Amazon. Most retailers that sell these extra-large mattresses will offer linens, as well.

If you’re looking for a mega-size mattress — whether you need more space for you, your partner, your kids, or your pet — the Alaskan king is one of the biggest you can buy. Consider your space and your budget, then make the best decision for your household.

Mallory Creveling, a New York City-based freelance writer, has been covering health, fitness, and nutrition for more than a decade. Her work has appeared in publications like Women’s Health, Men’s Journal, Self, Runner’s World, Health, and Shape, where she previously held a staff role. She also worked as an editor at Daily Burn and Family Circle magazine. Mallory, a certified personal trainer, also works with private fitness clients in Manhattan and Brooklyn. Originally from Allentown, PA, she graduated from Syracuse University’s S.I. Newhouse School of Public Communications.