If you’re looking for a truly massive bed, you might be wondering what’s the biggest mattress you can buy. The answer takes us into the world of custom and specialty sizes that go far beyond a standard King.
The largest standard mattress size widely available is the Alaskan King. But the actual biggest mattress you can get might be a custom creation. This guide will walk you through all the oversized options, from the largest standard sizes to bespoke behemoths, and help you figure out what you really need for your space.
What’s The Biggest Mattress You Can Buy
This title is held by the Alaskan King mattress in the realm of standard, named sizes. It measures a staggering 108 inches wide by 108 inches long. That’s 9 feet by 9 feet, creating a perfect square of sleeping surface. It offers an almost unimaginable amount of space, suitable for large families co-sleeping or anyone who values ultimate sprawl room.
However, “standard” here is relative. While it has a name and defined dimensions, it is not carried by most mainstream mattress stores. You typically need to order it from manufacturers who specialize in oversized beds. For context, a regular King mattress is 76 inches wide, so the Alaskan King adds an extra 32 inches of width—that’s wider than a twin mattress!
Other Giant Standard Mattress Sizes
Before you commit to an Alaskan King, consider these other large-format options. They might better suit your room layout and needs.
Wyoming King Mattress
A step down from the Alaskan, the Wyoming King is a rectangular giant. It usually measures 84 inches wide by 84 inches long (7 feet by 7 feet). This provides ample width for multiple sleepers or pets while maintaining a more traditional bed shape that might fit certain rooms better than a perfect square.
Texas King Mattress
The Texas King takes a different approach. It is longer rather than wider. Its dimensions are typically 80 inches wide by 98 inches long. This is the ideal choice for very tall individuals who fine standard lengths (like the 80-inch California King) still insufficient. It offers extra legroom without the extreme width of the Wyoming or Alaskan.
Family Size (or Alberta King) Mattress
This is another square format, often coming in at 96 inches by 96 inches (8 feet by 8 feet). It sits between the Wyoming and Alaskan King in size. The name “Family Size” hints at its intended use for co-sleeping with several children.
The World of Custom Mattresses
If even the Alaskan King isn’t enough, you can venture into custom sizing. This is truely where you answer “what’s the biggest mattress you can buy” on your own terms. Manufacturers can create mattresses to your exact specifications, limited mostly by your room size, budget, and the practicalities of getting it into your home.
- Limitless (in theory): You can order a mattress that’s 10 feet wide, 12 feet long, or any dimension you desire.
- Material Constraints: Very large sizes may require special order materials or construction techniques for support.
- Cost: Custom sizes are significantly more expensive due to non-standard materials and labor.
Critical Considerations Before Buying a Giant Mattress
Purchasing a bed of this scale isn’t like buying a standard Queen. It requires careful planning. Here are the essential factors you must think about.
Room Dimensions and Access
This is the most important step. You must measure meticulously.
- Measure your bedroom’s length and width. A good rule is to have at least 2-3 feet of walking space on each side of the bed.
- Consider other furniture. Will you still have room for dressers, nightstands, or a seating area?
- Measure all access routes. This includes doorways, hallways, staircases, and turns. Don’t forget to measure the height of doorframes. A mattress may fit through a doorway on its side but not on its edge.
Bed Frame and Foundation
A mattress this size cannot sit on a standard bed frame. You will need a specialized foundation.
- Custom Frame: You will likely need to order a custom-made bed frame or platform.
- Reinforcement: Ensure the frame has adequate center support legs to prevent sagging under the immense weight.
- Headboards/Footboards: These will also need to be custom-made or specially ordered.
Sheets, Bedding, and Protection
Finding bedding for an Alaskan or Wyoming King is not something you can do at a local department store.
You must be prepared to purchase all bedding—sheets, duvet covers, mattress protectors—from specialty retailers or custom linen makers. This is an ongoing cost and consideration, as these items are more expensive and may have limited style choices.
Delivery and Setup Logistics
Getting the mattress into your home is a major logistical challenge. Ask the retailer detailed questions:
- Do they use a white-glove delivery service that will handle the heavy lifting and placement?
- Will they remove old bedding and mattresses?
- Are there extra fees for delivery due to the size and complexity?
- What is their policy if the mattress doesn’t fit during delivery attempt?
Who Really Needs the Biggest Mattress?
These massive beds serve specific purposes. They aren’t for everyone, but for the right person, they’re a game-changer.
- Families who Co-Sleep: Parents with multiple young children who regularly share the bed.
- Individuals with Mobility Needs: People who require medical equipment in bed or need extra space to move comfortably due to physical conditions.
- Extremely Tall Sleepers: Those over 6’6″ for whom even a California King feels cramped.
- Pet Owners: If several large dogs sleep on the bed regularly, the extra space prevents crowding.
- Those Who Simply Love Space: If you sprawl out and value never being disturbed by a partner’s movement, the luxury of space is undeniable.
Cost Expectations for Oversized Mattresses
Be prepared for a significant investment. Pricing is highly variable, but here’s a general idea:
- Wyoming/Texas King: Often start around $3,000 and can go up to $8,000 or more for high-end models.
- Alaskan King: Typically starts in the $4,000-$5,000 range and can easily exceed $10,000.
- Custom Sizes: Anywhere from $5,000 to $20,000+, depending on materials, size, and brand.
Remember, this cost usually includes just the mattress. The custom frame, bedding, and delivery will add substantial additional expenses.
Alternatives to a Single Giant Mattress
If the logistics or cost of a single massive mattress are daunting, consider these clever alternatives that can create a similar sleeping area.
Using Two Mattresses Side-by-Side
You can place two identical Twin XL mattresses side-by-side to create a bed that is roughly 76 inches wide by 80 inches long (similar to a standard King). For even more width, use two Full/Double mattresses, creating a sleeping surface about 108 inches wide—similar to an Alaskan King’s width, but with a seam down the middle.
Pros: Easier to move, can use standard bedding on each side, potentially cheaper.
Cons: A gap or ridge can form between the two mattresses, which can be mitigated with a mattress connector pad or a single large mattress topper.
Custom Mattress Toppers
If you can manage the base mattress but want a seamless feel for a side-by-side setup, a custom-cut memory foam or latex topper can span both mattresses, creating a unified sleep surface on top.
Step-by-Step Guide to Purchasing Your Giant Mattress
- Finalize Your Size: Decide between a named oversized size (Alaskan, Wyoming, Texas) or a custom dimension based on your room measurements.
- Research Specialized Retailers: Look for reputable online and brick-and-mortar stores known for custom and oversized mattresses. Read customer reviews focusing on delivery and quality.
- Confirm All Measurements: Double-check your room access and dimensions with the retailer’s sales team. Some may even offer a virtual consultation.
- Inquire About Everything: Ask detailed questions about the frame, foundation, delivery process, warranties (which may differ for custom sizes), and return policies (which are often restrictive or non-existent for custom orders).
- Order Bedding in Advance: Source your sheets and protector before the mattress arrives so its ready to use immediately.
- Prepare the Room: Clear the path and the room completely. Remove doors from hinges if necessary, as advised by the delivery company.
FAQ Section
What is the biggest mattress size available?
The largest widely recognized standard size is the Alaskan King (108″ x 108″). However, you can order even larger custom mattresses from specialty manufacturers.
How big is an Alaskan King bed compared to a California King?
An Alaskan King (108″x108″) is vastly larger. A California King is 72″ wide x 84″ long. The Alaskan King is 3 feet wider and 2 feet longer, offering over 50% more total surface area.
Where can you buy an Alaskan King mattress?
You typically buy them from manufacturers and retailers that specialize in oversized or custom mattresses. These are mostly found online, though some larger metro areas may have showrooms. Major conventional mattress stores rarely stock them.
Can you get a mattress bigger than an Alaskan King?
Yes, through custom orders. There is no technical upper limit, but practical constraints like room access, manufacturing capabilities, and cost will apply. Some companies create “Family Beds” that exceed 10 feet in width.
What is the biggest mattress you can get from a regular store?
Most mainstream stores like Mattress Firm or Ashley Furniture will cap at California King or standard King sizes. You might occasionally find a Wyoming King at a very large flagship store, but the Alaskan King and beyond are almost exclusively from specialists.
Is a giant mattress worth the cost?
It depends entirely on your needs. For a family that co-sleeps every night or an individual with significant space requirements, the investment in sleep quality and comfort can be absolutely worth it. For others, it may be an impractical luxury.
Final Thoughts
Choosing the biggest mattress you can buy is a major decision that goes beyond just picking a size. It involves careful logistical planning, a significant budget, and a commitment to sourcing specialized accessories. While the Alaskan King holds the crown for named sizes, the true answer lies in what fits your life and your home.
Start with precise measurements, research reputable specialty manufacturers, and plan for every step from delivery to making the bed. The result, if done correctly, can be the ultimate sleep sanctuary—a bed that provides unparalleled space and comfort for years to come. Just make sure you have a big enough room for it first.