Is a California King the biggest mattress you can buy? No — but the real question is whether you actually need something bigger, or just something smarter.
This is one of the most searched mattress questions, and the answer changes depending on what problem you are actually trying to solve.
A Quick Reminder on King vs California King
Before talking about what is bigger, it helps to clear up a common misconception.
Standard King: 76 inches wide by 80 inches long
California King: 72 inches wide by 84 inches long
The California King is narrower and longer. Total surface area is almost identical. It is not a bigger mattress — it is a different shape.
Mattresses That Are Actually Bigger Than a California King
Yes, they exist. But they are not what most people are looking for.
Wyoming King: 84 inches by 84 inches
Texas King: 80 inches by 98 inches
Alaskan King: 108 inches by 108 inches
These are specialty or custom-order products. They require custom bed frames, custom sheets, and specialized delivery. They are not widely available and significantly more expensive. For most households they are impractical.
If you are shopping for more room because you share a bed and want more space — there is a more practical solution most people overlook.
The Better Answer for Most Couples: Split King
A Split King is two Twin XL mattresses placed side by side.
Each Twin XL is 38 inches wide by 80 inches long. Together they create a 76-by-80-inch sleeping surface — the same footprint as a standard King.
But each side operates independently.
With a Split King on an adjustable base, each person controls their own head and foot incline. One partner can elevate for reading while the other stays flat. One can use zero-gravity position while the other lies level. There is no compromise because there is no shared adjustment.
For couples with different sleep needs — different firmness preferences, different positions, different schedules — a Split King is often a better solution than simply going bigger.
What You Can Do on a Split King That You Cannot on a Single Mattress
- Each person adjusts head and foot incline independently
- Zero motion transfer — one person getting up does not disturb the other
- Different mattress feel on each side if needed
- Individual sleep positions throughout the night
The Ultimate Snooze Split King Options
Both the Core™ Bundle and Elite™ Bundle are available in Split King configuration, pairing organic latex mattresses with an adjustable base built for independent movement on each side.
The Core™ Bundle includes the Pure Organic Latex Mattress (Medium Firm) with the 3.0 Adjustable Base.
The Elite™ Bundle includes the Recovery Organic Latex Mattress (Medium feel) with the 5.0 Adjustable Base — the full premium experience with advanced comfort settings.
Both use organic cotton, organic wool, and natural latex designed for long-term recovery and sleep performance.
Explore Split King bundles at The Ultimate Snooze →
Frequently Asked Questions
Is a California King bigger than a King?
No. It is longer (84 vs 80 inches) but narrower (72 vs 76 inches). Total area is nearly the same.
What is the biggest mattress available?
The Alaskan King at 108 by 108 inches is the largest specialty size. Wyoming King (84x84) and Texas King (80x98) also qualify. These require custom frames and bedding.
What is a Split King?
Two Twin XL mattresses (38x80 each) placed side by side — same King footprint, but each side moves independently on its own adjustable base.
Is a Split King the same size as a regular King?
Same overall footprint (76x80). The difference is two independent surfaces instead of one.
Does The Ultimate Snooze offer Split King?
Yes. Both the Core™ and Elite™ bundles are available in Split King.
Final Thought
If you want more room in bed, the answer is not an impractical custom mattress. It is a Split King setup that eliminates compromise — giving each person their own surface, their own position, and their own sleep experience. That is where the real upgrade is.
