California King Mattresses

Shop award-winning California King size foam mattresses for great sleep, at an even greater price.

Graphic illustrations of different bed sizes with measurements on a light blue background Graphic illustrations of different bed sizes with measurements on a light blue background

How big is a California King size mattress?

A California King mattress is 84 inches long and 72 inches wide.

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Graphic illustration of a California King size mattress. Dimensions are 72" x 84" or 183 cm x 213 cm. Graphic illustration of a California King size mattress. Dimensions are 72" x 84" or 183 cm x 213 cm.

California King

Dimensions: 72” x 84”

The longest standard mattress on the market, the California king mattress measures a whopping 72 inches wide and 84 inches long. Its generous length makes it ideal for taller individuals, especially people more than six feet tall. Of course, people of average height might also benefit from a California king depending on how many people and pets are sharing the bed.

Mattress Sizing Chart

Twin Mattress - 38" x 75" : Often found in kid's rooms and studio apartments.
Twin XL Mattress - 38" x 80": Often found in college dorm rooms and studio apartments
Full Mattress - 53" x 75": Often found in guest rooms.
Queen Mattress - 60" x 80": Often found in master bedrooms.
King Mattress - 76" x 80": Often found in extra large master bedrooms.
California King Mattress - 72" x 84": Often found in extra large master bedrooms, perfect for gathering the family.

Settling for an OK mattress? Dream bigger.

If you’ve never flopped down, and drifted off on a Casper California King, it’s almost impossible to imagine this kind of regal comfort.
The Cal King size bed is a glorious 72 inches wide and 84 inches long, making it perfect for anyone who needs more sleeping space.

A couple sleeps, cuddling, in their bed. A couple sleeps, cuddling, in their bed.

Precision engineered for astonishing comfort.

With multiple layers of breathable, feathery-soft memory foam, our king mattresses deliver cooling, weightless sleep. Our Zoned Support design cradles you weightlessly, for night after night of cloud-like slumber.

Who Should Get a California King Size Bed?

A Treat for the Tall

The Cal King is 84 glorious inches long - slightly longer and narrower than a standard King.

Primary Suite Ready

The California King bed is ideal for a spacious master bedroom - think 13 by 13 feet.

Splendid for Sprawling

The Cal King offers a luxurious amount of space. Perfect for couples with kids or pets, or those who like to sprawl out.

Quality-built for years of dreaming.

Our standard Cal King size mattresses are designed in the USA using premium materials, certified safe for your family and the environment. Oh, and they come with a 10-year limited warranty.²
Close-up image of a person's hand pressing down on a mattress to feel it. Close-up image of a person's hand pressing down on a mattress to feel it.

Sprawl out & move around all you like

Casper mattresses will isolate your movement - thanks to proprietary foam technology. Although, narrower than a King, you'll still have enough room to not bother the person you're sleeping with.

California King Size Hybrid Mattresses

Delve into unmatched luxury with our California king hybrid mattresses. Seamlessly integrating the responsive dynamics of coil springs with the lavish embrace of memory foam, these hybrid mattresses are designed to adjust to your shape while imparting gentle support. Thoughtfully crafted, they foster great airflow, promising a fresh and cool night's slumber. Scroll below and immerse yourself in a refined combination of snugness, structural support, and temperature-regulating technology, all customized to enrich your nocturnal haven.

Which Casper California King Hybrid Mattress is right for you?

There are four versions to choose from if you're looking for a California King. Our hybrid collection combines the pressure relief of our original foam with the added lift from resilient springs.

Close-up of front side of a Casper Dream Max mattress. A couple is sitting near the edge of the bed behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium Soft feel, slightly more soft than it is firm. Close-up of front side of a Casper Dream Max mattress. A couple is sitting near the edge of the bed behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium Soft feel, slightly more soft than it is firm.

Dream Max

Our ultimate hybrid mattress with precision-cut foam and encased coils. Engineered with a gooey yet supportive medium-soft feel perfect for any sleep style—especially side sleepers.
A person lies on their side near the corner of a Casper Snow Max mattress. A digital illustration placed on the image shows that this mattress has a Medium Soft feel, slightly more soft than it is firm. A person lies on their side near the corner of a Casper Snow Max mattress. A digital illustration placed on the image shows that this mattress has a Medium Soft feel, slightly more soft than it is firm.

Snow Max

Our ultimate cooling hybrid mattress. Engineered with precision-cut foam and encased coils for a breathable and supportive medium-soft feel and Snow Technology for 12+ hours of cooler sleep.
Front-facing image of a Casper Dream mattress. A couple is seen sitting on their bed behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium feel between firm and soft. Front-facing image of a Casper Dream mattress. A couple is seen sitting on their bed behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium feel between firm and soft.

Dream

Combines the best of both worlds with resilient springs as the base for added lift and our proprietary foam for pressure relief. The "just right" feel is now even better.
A couple sits on top of their Casper Snow mattress. A digital illustration placed on top of the image shows that this mattress has a Medium feel, between firm and soft. A couple sits on top of their Casper Snow mattress. A digital illustration placed on top of the image shows that this mattress has a Medium feel, between firm and soft.

Snow

Our signature cooling hybrid mattress. Designed with soothing foam and encased coils for a supportive, medium feel plus Snow Technology for 12+ hours of cooler sleep.

California King Size Memory Foam Mattresses

Venture into a tranquil sanctuary with our California king size memory foam mattresses. Skillfully designed with state-of-the-art memory foam, these mattresses offer a gateway to a dimension where the curves of your anatomy are delicately embraced, dissolving daily stresses during your sleep. Each memory foam mattress offers a sleep-conducive environment, achieving a harmonious equilibrium between enveloping softness and refreshing ventilation. Continue below to discover the embodiment of restful opulence.

Which Cal King Size Memory Foam mattress is right for you?

If you're looking for an all foam mattress that doesn't sacrifice comfort, there’s a Casper California king size mattress for you.

Close-up of the front side of a Casper One mattress. A person is seen resting on the mattress behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium Firm feel, slightly more firm than it is soft. Close-up of the front side of a Casper One mattress. A person is seen resting on the mattress behind the name tag. A digital illustration placed on the image shows that this mattress has a Medium Firm feel, slightly more firm than it is soft.

The One

The One was engineered using feedback and data from customers like you. If sleeping on a cloud sounds good, consider this your sweet spot.

Memory Foam vs. Hybrid California King Size Mattresses

Memory foam Cal king size mattresses are known for their exceptional body contouring and motion isolation, ensuring every sleeper feels cradled throughout the night. They offer a personalized sleep experience by molding precisely to your body, optimizing pressure relief.

Hybrid mattresses elevate the game by blending the unmatched comfort of memory foam with the robust resilience of springs. This combination results in a mattress that not only provides the coziness of memory foam but also ensures enhanced airflow, superior edge support, and a slightly buoyant feel.

Interested in learning more? Read through our comprehensive memory foam vs. hybrid mattresses guide.

Frequently asked questions

How Casper keeps prices low and quality high

When Casper was founded in 2014, many people were skeptical. Would consumers really buy a standard king size mattress without testing it first? Several years and numerous awards later, we have an answer: It turns out no one likes visiting stuffy mattress showrooms to make high-stakes purchases under the scrutiny of needy salespeople. (Who knew??)

Everyone loves the ease and convenience of buying online from a trusted source, and having a high-quality mattress shipped in a box to their doorstep. And people keep spreading the word that our mattresses deliver unparalleled comfort and support, top-notch construction quality, and high-tech, innovative design.

But the Casper experience isn’t just about quality, trust, and transparency. Our mattresses are a mere fraction of other brands’ prices. That’s because we’ve flipped the mattress industry on its head. By eliminating showrooms and middlemen, we keep our costs low - and pass those savings on directly to you.