What’s The Biggest Mattress

If you’ve ever wondered “what’s the biggest mattress” you can buy, you’re in the right place. The biggest mattress available for consumers is the Alaskan King, but finding the right giant bed involves more than just knowing it’s name.

This guide will walk you through all the oversized mattress options, their pros and cons, and the practical things you need to consider before making such a large purchase. From measuring your room to finding sheets, we’ve got you covered.

The title for the biggest standard mattress goes to the Alaskan King. It measures a massive 108 inches wide by 108 inches long. That’s 9 feet by 9 feet, creating a perfect square of sleeping space. It’s designed to comfortably sleep entire families or anyone who values maximum personal space.

However, “biggest” can mean different things. Some mattresses are extra long, while others are extra wide. Here’s a breakdown of the common oversized mattress types, from largest to more common king sizes.

Oversized Mattress Types and Dimensions

Standard mattress sizes are well-known, but the world of oversized beds is a bit different. Dimensions can vary slightly by manufacturer, so always double-check.

Alaskan King: 108″ x 108″ (9′ x 9′). The largest standard option.
Wyoming King: 84″ x 84″ (7′ x 7′). A large square option, smaller than the Alaskan.
Texas King: 80″ x 98″. Extra long and wide, great for very tall individuals.
Family Size (or Ontario): Roughly 96″ x 192″. An extremely long and narrow option, rare.
California King: 72″ x 84″. The longest standard mattress, but narrower than a standard King.
Standard King (Eastern King): 76″ x 80″. The widest standard mattress.

Alaskan King: The Undisputed Giant

Let’s talk more about the Alaskan King, since it holds the record. It offers an incredible 11,664 square inches of surface area. For comparison, a standard King has about 6,080 square inches. That’s nearly double the space!

This mattress is ideal for:

Families who co-sleep with young children or pets.
Couples who want an extraordinary amount of personal sleeping space.
Individuals with mobility issues who need extra room to maneuver.
Anyone who simply loves sprawling out.

Challenges of an Alaskan King

Its size is also it’s biggest drawback. You will face several logistical hurdles:

Room Size: Your bedroom likely needs to be at least 14 feet by 14 feet to accommodate it comfortably with other furniture.
Access: It may not fit up stairwells, around tight corners, or through standard door frames. You might need professional movers or even a crane.
Cost: The mattress, foundation, and custom bedding are significantly more expensive than standard sizes.
Bedding: Sheets, mattress protectors, and comforters are specialty items and not available in regular stores.

Wyoming King and Texas King: Other Jumbo Options

If the Alaskan King seems too big, the Wyoming King and Texas King are popular compromises.

The Wyoming King (84″x84″) is still a huge square but more manageable than the Alaskan. It provides ample space for families without completely dominating a room. The Texas King (80″x98″) is uniquely designed for extreme height. It’s perfect for basketball players or anyone over 6’5″ who finds their feet hanging off a standard bed.

Why Choose a Giant Mattress?

The reasons go beyond just having a big bed. The benefits can significantly improve your sleep quality and lifestyle.

Unmatched Personal Space: No more elbow wars or stealing covers. Each sleeper has the equivalent of a full-size bed to themselves in an Alaskan King.
Family Bonding: Perfect for safe co-sleeping with infants or weekend morning cuddles with older kids and pets.
Improved Sleep Quality: Less disturbance from a partner’s movements means fewer wake-ups and deeper sleep cycles.
Accommodates Special Needs: Helpful for individuals with conditions like PTSD, who need space, or those recovering from injury.
Luxury and Comfort: It’s the ultimate in bedroom luxury, offering a feeling of openness and relaxation.

Practical Considerations Before You Buy

Buying the biggest mattress isn’t like buying a twin. It requires careful planning. Here is a step-by-step checklist to follow.

Step 1: Measure Your Space Precisely

Grab a tape measure. You need more than just room for the bed frame.

Measure the room’s length and width.
Account for doors, closets, and windows that open.
Leave at least 2-3 feet of walking space on each side and at the foot of the bed.
Consider other furniture like dressers and nightstands.

Step 2: Plan the Delivery Path

This is critical. Map the entire route from the truck to your bedroom.

Measure all hallways, stairwells, and doorways (height and width).
Check for tight turns or low-hanging light fixtures.
Some companies sell “split” or “foldable” models for easier delivery.

Step 3: Budget for the Entire Package

The mattress cost is just the start. Your total budget should include:

The mattress itself (can range from $3,000 to $10,000+).
A compatible foundation or bunkie board.
A heavy-duty bed frame designed for the weight.
Custom-sized sheets, protectors, and blankets.
Potential delivery and setup fees, especially if special equipment is needed.

Step 4: Research Custom Bedding

You cannot walk into a store and buy Alaskan King sheets. You’ll need to order them custom-made online. Factor in lead times and cost for multiple sets. Look for companies that specialize in oversized bedding.

Finding and Purchasing Your Oversized Mattress

You won’t find these on most showroom floors. Your search will be mostly online.

Specialty Manufacturers and Retailers

Several reputable companies cater to the oversized mattress market. Look for brands with strong customer reviews and clear policies. They often offer detailed FAQs about delivery and customization. Be prepared to order based on specifications rather than testing in person.

Questions to Ask the Seller

What is the exact, finished dimension of the mattress?
Do you offer a split or flexible model for delivery?
What is the weight of the mattress? (This affects moving and foundation needs).
What is the return policy and process? How would a return even work?
Can you recommend sources for foundations, frames, and bedding?
What are the estimated delivery timelines?

Understanding Mattress Types for Large Beds

The construction is important for durability and support across such a large surface.

Innerspring: Traditional, but ensure it has a high coil count and a sturdy edge support system.
Memory Foam/Latex: Excellent for motion isolation. High-density foam is crucial for longevity.
Hybrid: Combines coils with foam layers, often a good balance of support and comfort for heavy use.

Caring for Your Giant Mattress

Once you have it, maintaining it is key to making your investment last.

Use a Mattress Protector

This is non-negotiable. A custom, waterproof protector will shield against spills, stains, and allergens. Replacing a protector is far cheaper than cleaning or replacing the mattress itself.

Regular Rotation

Even without a designated “head” and “foot,” you should rotate your mattress 180 degrees every 3-6 months. This prevents body impressions from forming in the same spots and ensures even wear. Some companies recommend not flipping, only rotating, so check your warranty.

Proper Support is Key

A giant mattress needs a seriously supportive base. A flimsy frame or too few slats will void your warranty and cause the mattress to sag. Use the foundation recommended by the manufacturer, whether its a platform bed with closely spaced slats, a bunkie board, or a traditional box spring designed for the weight.

Cleaning Tips

Vacuum the surface regularly with an upholstery attachment. For spot cleaning, use a mild detergent with cold water and blot gently—never soak. Allow it to air dry completely before putting bedding back on to prevent mold.

FAQ Section

What is the biggest bed size you can buy?

The Alaskan King is the biggest standard oversized mattress size at 108 inches by 108 inches. Custom orders can be made even larger, but they are exceptionally rare and expensive.

How much does the largest mattress cost?

Prices vary widely based on materials, but expect to pay a minimum of $3,000 for a basic model, with high-end models reaching $10,000 or more before adding the cost of the frame and bedding.

Where can I buy sheets for an Alaskan King mattress?

You must purchase them from specialty online retailers or through custom order from the mattress manufacturer themself. Major big-box stores do not carry this size.

Can any bed frame fit a Wyoming King?

No. You must use a bed frame specifically designed for the Wyoming King dimensions and weight capacity. A standard king frame will not work and could be dangerous.

Is it hard to move a Texas King mattress?

Yes, due to it’s length (98 inches), it can be very difficult to maneuver through standard homes. Always measure your delivery path carefully and ask the seller about flexible or split options.

Do oversized mattresses come with a warranty?

Most do, but read the terms carefully. Warranties often prorate over time and have specific requirements for support and care that you must follow to keep it valid.

Final Thoughts

Owning the biggest mattress is a unique commitment that brings incredible comfort but requires thorough planning. The Alaskan King, Wyoming King, and Texas King offer solutions for families, tall individuals, and anyone craving supreme personal space.

Before taking the plunge, carefully measure your room and home access, budget for the complete sleep system, and research reputable manufacturers. The effort is well worth it for the years of luxurious, undisturbed sleep you’ll gain. Remember, the best mattress isn’t always the biggest one—it’s the one that fits your life, your room, and your needs perfectly.