What Is The Widest Mattress

If you’re looking for the absolute maximum sleeping space, you might be asking what is the widest mattress. The answer isn’t as simple as a single size, because the widest standard mattress you can buy is a California King, but custom and specialty options go far beyond that.

This guide will walk you through every option, from the biggest standard size to massive custom builds. We’ll cover what you need to know about dimensions, room requirements, and where to find them.

In the world of standard mattress sizes sold in the US, the California King is officially the widest. It measures 72 inches wide by 84 inches long. However, the term “widest” can lead to some confusion, as the more common King size (76″ x 80″) is actually wider but shorter. So for pure width, a standard King is the winner off the shelf.

But the true answer to the quest for width lies beyond standard sizes. Custom mattress makers can create beds that are 10 feet wide or even larger, limited mostly by your room dimensions and budget.

Understanding Standard Mattress Widths

Let’s break down the common sizes you’ll find in most stores. Knowing these gives you a baseline for comparison.

Twin: 38″ wide x 75″ long. The narrowest standard option.
Twin XL: 38″ wide x 80″ long. Extra length for taller sleepers.
Full (Double): 54″ wide x 75″ long. Offers more width for a single sleeper.
Queen: 60″ wide x 80″ long. The most popular size, balancing space and room fit.
King (Standard King): 76″ wide x 80″ long. The widest standard mattress you can commonly buy.
California King: 72″ wide x 84″ long. Narrower but longer than a standard King.

Why Would Someone Need an Extra Wide Mattress?

The reasons for seeking extreme width are more common than you might think. It’s not just about luxury; it’s often about practical comfort.

Co-sleeping Families: Parents who sleep with young children or pets appreciate the extra real estate.
Combined Pet Space: For those with multiple large dogs who sleep on the bed.
Medical Needs: Individuals with mobility issues or who need specialized equipment nearby.
Pure Sprawl Factor: Sleepers who move a lot or simply hate feeling confined.
Unique Room Shapes: Fitting a bed into a large, open loft or a custom-built space.

The Room Size Challenge

Before you get excited about a giant bed, you must measure your room. A good rule is to have at least 2 feet of walking space on three sides of the bed. For a 10-foot wide mattress, your room should ideally be at least 14 feet wide just to accommodate the bed and basic movement.

Don’t forget about doorways, hallways, and staircases. Getting a massive mattress into the room can be a huge logistical puzzle. Some custom mattresses are built in sections for this exact reason.

Beyond Standard: Common “Super Size” Options

Many mattress companies offer sizes that step beyond the standard King. These are sometimes called “Specialty” or “RV” sizes.

Texas King: Typically around 80 inches wide by 98 inches long. A massive bed for tall families.
Wyoming King: Often measures 84 inches wide by 84 inches long. A perfect square of sleeping space.
Alaskan King: The giant. It can be 108 inches wide by 108 inches long (9 feet by 9 feet). This is a true custom size that varies.

It’s important to note that these names aren’t strictly regulated. Dimensions can vary between manufacturers, so always ask for the exact measurements in inches.

How to Order a Custom Widest Mattress

If you’ve decided a standard size won’t cut it, here’s how to proceed with a custom order.

Measure Your Space Precisely: Measure the room, the pathway to it, and any tight turns. Decide on your maximum possible dimensions.
Research Custom Mattress Companies: Look for brands known for custom work. Many are online but have showrooms in major cities.
Choose Your Materials: Custom sizes apply to all types: memory foam, innerspring, latex, or hybrid. Consider edge support for such a large surface.
Inquire About Construction: Ask if the mattress will be made in one piece or multiple sections that zip together. Sectional can be easier to move and set up.
Get a Quote: Custom means custom pricing. Be prepared for a significant cost increase over standard sizes, plus potential shipping fees.
Plan for Bedding: You will need custom sheets, blankets, and a bed frame. Factor this into your timeline and budget, as they can’t be bought off the shelf.

Potential Drawbacks of a Massive Mattress

It’s not all endless space and comfort. There are some real challenges to consider.

Cost: The mattress, bedding, and custom frame will all be expensive.
Moving Difficulty: Moving it into your home and to any future home is a major undertaking.
Bedding Hassle: Washing custom-sized sheets requires large capacity machines.
Room Dominance: The bed will be the sole focus of the bedroom, leaving little space for other furniture.

Alternatives to a Single Giant Mattress

If a custom mattress seems daunting, there are clever alternatives that achieve similar goals.

Two Mattresses Combined: Push two identical Twin XLs together to make a 76″ x 80″ bed (like a King). Two Fulls make a huge 108″ wide bed. Use a mattress connector strap to keep them aligned.
European-Style Bedding: In some countries, it’s common to use two separate duvets on a wide bed, reducing blanket tug-of-war.
Oversized Daybeds or Chaises: For a reading or lounging area, a huge daybed might offer the surface area you need without being a primary sleep space.

Finding the Right Bed Frame and Foundation

A mattress this size needs proper support. A standard bed frame won’t work.

Custom Wood Frame: Hire a carpenter to build a solid platform frame with ample center support. This is the most common solution.
Adjustable Base: Some companies make split-head adjustable bases that can be synced. You might need two Twin XL bases side-by-side for a very wide bed.
Simple Platform: A low-profile, solid platform built directly on the floor can work, but ensure there is airflow to prevent moisture.

Never just place a giant mattress on a standard bed frame or on the floor without a plan for support. It will sag and be damaged quickly.

Mattress Care for Large Sizes

Rotating a mattress that weighs hundreds of pounds is nearly impossible. Here’s how to maintain it.

Use a Mattress Protector: Spills are harder to clean when you have to crawl across a vast surface. A waterproof protector is essential.
Even Out Wear: Try to vary where you sleep slightly over time, if possible, to prevent body impressions in one spot.
Check Support Regularly: Every few months, look under the bed to ensure the center supports haven’t shifted or sagged.

Final Checklist Before You Buy

Ready to take the plunge? Run through this last list.

✓ Room dimensions allow for 2+ feet of walking space on three sides.
✓ Doorways, stairs, and hallways are wide enough for delivery (or you’ve confirmed sectional construction).
✓ Budget includes mattress, custom frame, custom bedding, and delivery/installation.
✓ You have a plan for making the bed (stepping stools can help!).
✓ You’ve considered alternatives like combining two mattresses.

Choosing the widest mattress is a commitment to ultimate sleeping space. It solves the problem of feeling cramped, but introduces new logistical considerations. By planning carefully and working with a reputable company, you can create a sleep haven that’s perfectly sized for your needs. The comfort of having all the room you could ever want is often worth the extra effort and cost.

FAQ Section

Q: What is the widest mattress you can buy in a store?
A: In most regular mattress stores, the widest standard option is a King size mattress, which is 76 inches wide. Some larger stores may carry Texas or Wyoming King sizes, but these are less common.

Q: How wide is an Alaskan King mattress?
A: An Alaskan King mattress is typically 9 feet by 9 feet (108 inches by 108 inches), but because it’s a custom size, you should always confirm the exact dimentions with the maker.

Q: Can I make a wider bed by putting two mattresses together?
A: Absolutely. This is a very effective and often more affordable strategy. For example, two Twin XL mattresses equal a Standard King (76″x80″). Two Full mattresses side-by-side create a bed 108 inches wide.

Q: Where do you buy sheets for an extra wide mattress?
A: You will almost always need to order custom bedding. Many companies that sell custom mattresses also sell the sheets and mattress protectors to fit them. You provide the dimensions, and they make them to order.

Q: Is a California King wider than a King?
A: No, that’s a common mix-up. A California King is actually narrower (72″ wide) but longer (84″ long) compared to a standard King (76″ wide x 80″ long). So for pure width, the standard King is the winner.