What’s The Biggest Size Mattress

If you’re shopping for a new bed, you might be wondering, what’s the biggest size mattress you can buy? The answer is more detailed than you might think, as the “biggest” can refer to standard retail sizes, custom-made giants, or specialized options for unique needs. This guide will walk you through everything you need to know about large mattresses, from common dimensions to the practicalities of fitting one into your home.

In the world of standard mattress sizes sold in the US, the Alaskan King and Wyoming King are among the largest. However, the true “biggest” mattress often comes from the custom market, where beds can be made to virtually any dimension for luxury homes, celebrities, or those with specific requirements. We’ll cover both standard oversized options and the realm of custom creations.

Standard “Oversized” Mattress Dimensions

Before we look at the true giants, let’s review the common large sizes that are readily available from many retailers. These are your first step beyond a conventional King.

California King (CK): Measures 72″ wide x 84″ long. It’s longer but narrower than a standard King, ideal for very tall individuals.
Texas King: A oversized option that typically measures 80″ wide x 98″ long. It offers massive length for tall sleepers and extra width.
Alaskan King: This one is a true square giant at 108″ wide x 108″ long (9 feet by 9 feet). It’s designed for families who co-sleep or for those who want immense space.
Wyoming King: Slightly smaller than the Alaskan, usually measuring 84″ wide x 84″ long (7 feet by 7 feet). It provides a perfect square footprint.

The Custom Mattress World: Where Size Has No Limit

For those who’s needs aren’t met by even the largest standard sizes, custom mattress makers are the solution. These companies build mattresses to your exact specifications.

You can order a mattress that fills an entire room, creates a massive lounge area, or accommodates an unusual space. The only real limits are the size of your room, your budget, and the ability to get it inside your house. Prices can range from several thousand to tens of thousands of dollars.

Considerations for a Custom Giant Mattress

Access: Measure all doorways, staircases, and hallways. The mattress may need to be built in sections or inflated on-site.
Foundation: You’ll need a custom bed frame or platform. Some people use multiple bed frames pushed together or a custom-built plywood base.
Bedding: All sheets, duvets, and mattress protectors will need to be custom-made, adding significant ongoing cost.

Practical Factors to Consider Before Going Big

Choosing the biggest size mattress isn’t just about the wow factor. Several practical elements will impact your daily life and comfort.

Room Size and Layout

Your bedroom needs to comfortably fit the mattress with space to walk around. A good rule is to have at least 2-3 feet of walking space on three sides of the bed. For a massive Alaskan King, you’re looking at a room that should be at least 14 feet by 14 feet to feel balanced. Don’t forget about other furniture like dressers and nightstands.

Delivery and Installation Challenges

Getting a large mattress into your home can be a logistical puzzle. Many companies that sell oversized mattresses have experienced delivery teams who know how to handle them. Key questions to ask:

Do they offer white glove delivery?
Will the mattress be rolled and compressed (bed-in-a-box) or delivered rigid?
Are there additional fees for complex deliveries (stairs, tight corners)?

Cost Implications

The price increases dramatically with size. A high-quality California King can cost $2,000-$4,000. An Alaskan King can easily surpass $5,000. Custom sizes will be even more. Remember to budget for the special bedding, a capable foundation, and potentially higher heating/cooling costs for the larger room space.

Who Really Needs the Biggest Mattress Size?

While anyone can enjoy the space, these sizes are particularly beneficial for specific situations.

Families who Co-sleep: Parents with multiple young children who share the bed will appreciate the safe space.
Couples with Different Sleep Schedules: The space minimizes disturbance if one partner tosses, turns, or gets in and out of bed frequently.
People with Large Pets: If your dogs sleep on the bed, the extra space prevents a crowded feeling.
Individuals with Mobility Issues: More space can make it easier to get in and out of bed or use mobility aids.
Those who Use the Bed for Activities: Reading, working on a laptop, or watching TV as a family is more comfortable on a huge bed.

Step-by-Step: How to Choose Your Oversized Mattress

Step 1: Measure Your Room Precisely

Use a tape measure and map out the floor space. Use painter’s tape to mark the dimensions of the mattress on the floor. This visual will help you see how much walking room you’ll have left.

Step 2: Assess Your Access Points

Measure the width and height of every door, hallway, and staircase from the street to your bedroom. Compare this to the smallest dimension of the mattress you want. If it won’t fit, ask the manufacturer about alternative delivery methods.

Step 3: Set a Realistic Budget

Include the mattress, foundation, bedding, delivery fees, and any potential room modifications (like moving electrical outlets or baseboard heaters). It’s easy to underestimate the total cost.

Step 4: Research Specialty Retailers

Not all brands make oversized mattresses. Look for companies that specialize in large formats or offer robust custom programs. Read reviews specifically about their delivery and customer service for large orders.

Step 5: Test Comfort if Possible

If you can’t find a showroom with an Alaskan or Wyoming King on display, focus on the feel of the mattress material in a smaller size. The firmness and support of the foam or springs should be consistent across sizes.

Common Alternatives to a Single Giant Mattress

If a single, massive mattress seems to daunting or impractical, consider these solutions that offer similar benefits.

Two Mattresses Combined: Push two identical Twin XL mattresses together to make a standard King (76″x80″). Use two standard Kings side-by-side for a colossal 152″ wide sleeping surface. You’ll need a strap or connector to prevent drifting apart.
Modular or Sectional Mattresses: Some companies sell beds that click together in sections, allowing for flexible sizing and easier movement through tight spaces.
A Large Bed with Separate Toppers: Use a standard King or California King as your base, but add individual, split-firmness mattress toppers for each sleeper. This addresses different comfort needs without the custom size cost.

Caring for Your Oversized Mattress

Maintenance is crucial for longevity, especially with such a significant investment.

Rotate Regularly: Rotate the mattress head-to-foot every 3-6 months to ensure even wear. Some models also recommend flipping.
Use a Protective Cover: A high-quality, waterproof mattress protector is essential. Finding a custom-sized one is easier than finding fitted sheets.
Ensure Proper Support: Check the foundation or bed slats regularly. An undersupported mattress will sag and fail prematurely.
Clean Spills Immediately: Blot, don’t rub, any liquid spills. Follow the manufacturers cleaning instructions carefully to avoid voiding the warranty.

FAQ Section

What is the biggest mattress size available to buy?

The biggest standard retail sizes are the Alaskan King (9’x9′) and Wyoming King (7’x7′). However, through custom mattress makers, you can order beds that are even larger, limited only by your room and budget.

Is a California King bigger than a standard King?

It’s longer but narrower. A standard King is 76″ x 80″, while a California King is 72″ x 84″. So, a Cal King offers more legroom for tall people, but less width for couples.

How much does an Alaskan King mattress cost?

Prices vary widely based on materials, but you can expect to pay anywhere from $4,000 to well over $10,000 for a high-quality Alaskan King mattress, not including the custom foundation and bedding.

Can you get sheets for an oversized mattress?

Yes, but they usually need to be custom-ordered. Some online retailers specialize in sheets for non-standard sizes. It’s best to order the bedding at the same time as the mattress to ensure you have it ready.

What’s the difference between a Texas King and an Alaskan King?

A Texas King is typically a rectangle (often 80″x98″), offering great length. An Alaskan King is a perfect square (108″x108″), offering immense overall space for multiple sleepers or activities.

Do I need a special bed frame for a giant mattress?

Absolutely. Standard bed frames won’t fit. You’ll need to order a custom frame or platform base designed for your mattress’s exact dimensions to ensure proper support and prevent damage.

Final Thoughts on Choosing a Massive Mattress

Choosing the biggest size mattress is a major decision that goes beyond simple comfort. It involves careful planning around your space, budget, and lifestyle needs. While the idea of a sprawling bed is appealing, the practicalities of delivery, setup, and ongoing maintenance are significant.

For most people, a standard King or California King provides ample space. But for those with large families, specific needs, or a desire for ultimate luxury, exploring the world of oversized and custom mattresses opens up exciting possibilities. Just remember to do your homework, measure twice, and choose a reputable manufacturer who can guide you through the process. Your perfect, giant bed is out there, waiting to be found.