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A California king mattress measures 72" x 84", making it the longest standard mattress size available. It's the best choice for tall sleepers who need extra legroom and for couples who prefer length over width. Shop the best California king mattresses at Turmerry! Made with GOLS-certified organic latex, they're built to last well over a decade. Every order comes with free shipping and a 120-night trial.
Want help finding the best California king mattress for you? Try our personalized mattress quiz.
A California king mattress measures 72 inches wide and 84 inches long. It's the longest standard mattress size you can find today, being four inches longer (and four inches narrower) than a standard king. Two adults each get 36 inches of sleeping space side by side on a Cal king.
The California king is the recommended choice for tall sleepers who've felt cramped on shorter mattresses, comfortably accommodating sleepers up to 6 feet 8 inches tall without their feet hanging off the edge. It works well for couples, and it's also a great choice for families who co-sleep with a young kid or pet, though the narrower profile means it suits pairs who don't need maximum width between them.
For couples with different firmness preferences, a split California king mattress is better. Two 36 x 84 inch mattresses side by side, each customized to the sleeper on that side, in one shared bed frame.
Here's a table to help you compare California king mattresses with other mattress sizes:
| Mattress Size | Dimensions (W x L) | Best For |
|---|---|---|
| California King | 72 x 84 inches | Tall couples (over 6 feet) who prioritize extra legroom |
| Twin | 38 x 75 inches | Toddlers, young kids, bunk beds, daybeds, small guest rooms |
| Twin XL | 38 x 80 inches | Tall teenagers, college dorms, single adults over 6 feet tall, split king setups |
| Full | 54 x 75 inches | Solo sleepers who want extra room to spread out, growing teens, guest rooms |
| Queen | 60 x 80 inches | Couples, solo sleepers who like extra space, standard master bedrooms (most popular size) |
| King | 76 x 80 inches | Couples who want maximum personal space, families who co-sleep with kids/pets |
You should buy a California king size mattress if:
If neither you nor your partner is particularly tall, a standard king size mattress is the better call. You get four more inches of width without sacrificing any length that would get used. And if you're tight on budget, a queen mattress still offers plenty of space for two people.
Note: For couples who have very different firmness preferences, a split California king mattress is recommended.
Turmerry mattresses are made with high-quality materials, including certified organic latex, cotton, wool, and pocketed coils. With benefits ranging from responsive support and contouring pressure relief to breathable cooling, they're some of the best California king mattresses online.
Latex responds to your movements instantly, pushing back as you shift positions. Turmerry mattresses are built with 7-zone support, firmer under heavier areas like the hips and lower back, softer under lighter areas like the shoulders and thighs. Your spine stays aligned through the night without any single pressure point taking too much load.
Latex contours closely to the shape of your body, distributing weight evenly across the surface. This reduces pressure buildup at the shoulders and hips, which is especially useful for side sleepers who concentrate weight through those areas for hours at a time.
Latex has an open-cell structure that lets air move through it, and our perforated layers improve this further. The wool layer wicks moisture and buffers heat, keeping you warmer in winter and cooler in summer without synthetic cooling additives.
On a 72-inch-wide mattress, motion isolation is important for couples sharing the bed. Latex absorbs movement well, so a restless partner, child, or pet on one side won't wake the other. The edges hold up well too. Dunlop latex is dense enough to stay firm at the borders, so you can use the full 72 inches of sleeping surface without the sides giving way.
Dunlop latex doesn't sag the way memory foam and polyfoam do. A well-maintained Turmerry mattress lasts well over a decade, making it a better long-term investment than cheaper options that need replacing every few years.
Latex is naturally resistant to dust mites, mold, and mildew. Combined with the organic cotton and wool cover, Turmerry's California king mattresses are a good fit for anyone with allergies or chemical sensitivities.
Turmerry mattresses carry GOLS and OEKO-TEX certifications for the organic latex, GOTS for the organic cotton, and LGA for overall quality. Every certification is third-party verified, confirming the materials are free from harmful substances and built to last.
Every California king mattress ships free across the US and comes with a 120-night sleep trial. That's enough time to know whether the mattress is working properly for you.
A California king bed needs at least 12 x 12 feet of floor space for comfortable movement. The extra length pushes it beyond what a standard bedroom can handle comfortably, so make sure to measure your room before committing. If you're adding a lot of other furniture, you'll want more than the minimum (12 x 14 feet or more).
Price-wise, California kings sit at the top of the standard size range. Entry-level options cost between $800 and $2,000, while premium latex/hybrid models start around $1,600 and can go past $2,800. Turmerry's organic latex California king mattresses start at $1,799, which is competitive for certified organic latex that outlasts memory foam by years.
One more thing to factor in: California king bedding and frames aren't interchangeable with standard king sizes. If you're switching from a queen or a regular king, budget for a new bed frame and any other bedding accessories on top of the mattress itself.
These are the four most popular California king mattress types you'll find on the market:
Latex mattresses are made from natural or synthetic rubber. Natural Dunlop latex (what we use in our mattresses) is the densest and most durable of the four. It responds quickly as you move, holds up for 15 to 20 years, and doesn't trap heat the way memory foam does. It's naturally hypoallergenic too. Latex costs more upfront than the other types, but you won't be replacing it every few years, which makes it the better long-term value.
Memory foam molds to your body under heat and pressure, then slowly bounces back when you get up. It's great for pressure relief, but it retains heat and responds slowly when you change positions. It also breaks down faster than latex, so the support doesn't last as long. On a California king, where two people are generating heat all night, that's worth keeping in mind.
Hybrid mattresses combine pocketed coils at the base with a latex or memory foam comfort layer on top. The coils keep the mattress ventilated and add bounce, while the comfort layer handles cushioning and pressure relief. Hybrids have better edge support and airflow than all-foam options and last longer than memory foam. A solid pick for couples who sleep hot or need strong edge support across a wide mattress.
Innerspring mattresses are built around interconnected coils with a thin comfort layer on top. They're the most affordable of the four and one of the coolest to sleep on, thanks to airflow through the coils. The downsides are minimal cushioning at pressure points, poor motion isolation, and a shorter lifespan compared to latex and hybrid options.
Consider all of these factors before finalizing your purchase:
Sleep position and body weight together decide the right firmness. Side sleepers need a softer mattress to cushion the shoulders and hips. Back sleepers need a medium-firm mattress to keep the spine aligned. Stomach sleepers need a firm mattress to prevent the hips from sinking. Lighter sleepers need a softer feel, heavier sleepers need firmer support, and average-weight sleepers do well in the middle. For couples with different needs, a split California king lets each person choose their own firmness level.
Around 10 to 12 inches is the right thickness range for most couples on a California king. Two people compress a mattress more than one, so leaning toward the thicker end gives both sleepers adequate support through the base layers. Heavier sleepers should go for 12 inches or more. Thickness also affects how high the bed will be, which is worth considering for older sleepers.
Natural latex stays supportive for 15 to 20 years without sagging. Memory foam contours closely but traps heat and breaks down faster. Hybrids pair pocketed coils with a memory foam or latex comfort layer for better airflow and edge support than all-foam. Innerspring is the most affordable but wears out fastest and offers the least pressure relief.
Two people sleeping together generate more heat than one, so temperature regulation is worth prioritizing on a California king. Latex has an open-cell structure that lets air move through it. A wool layer wicks moisture away and keeps temperature steady through the night. Hybrids add ventilation through the coil base. Avoid memory foam as it retains heat by default.
California king mattresses are priced at the higher end of the size range. You can find decent, high-quality models starting at around $1,200 to $2,000. Factor in a California king bed frame and bedding on top of the mattress cost. If you're upgrading from a queen or standard king, your current sheets likely won't fit a California king.
On a 72-inch mattress shared by two people, motion isolation is one of the most important factors. Latex absorbs movement well across the full surface. Pocketed coils in a hybrid help too, since each coil moves independently. Interconnected innerspring coils transfer motion across the whole surface, so avoid them if you share the bed.
Strong edge support lets both partners use the full 72 inches of sleeping surface without the sides collapsing. Latex holds its shape well at the borders due to its density. Hybrids with reinforced perimeter coils do this even better. Memory foam compresses at the edges under body weight, so it's best to avoid it if you need good edge support.
Two sleepers put more load on a mattress than one, so durability is something you need to pay extra attention to on a California king. Latex lasts 15 to 20 years with proper care. Quality hybrids hold up for 8 to 10 years. Memory foam and innerspring mattresses can start sagging within 5 to 7 years. If you're considering an all-foam mattress, check the base foam density since low-density foam breaks down faster.
A California king is a big investment, so take full advantage of the trial period. Look for a minimum of 60 to 90 nights. For warranty, 10 years is a reasonable baseline for latex and hybrid mattresses. Read what the warranty covers before buying since the details vary between brands.
On a California king specifically, look for reviews from couples rather than solo sleepers. A review from a 130-lb side sleeper won't tell you much if you're a 220-lb back sleeper sharing the bed with a partner. Reviews from people who've had the mattress for two or more years are the most useful since that's when durability problems tend to show up in low-quality models.
The right bedding makes a real difference in how your Cal king mattress feels night to night. Here's what we recommend:
A California king needs a solid base. Two people on it every night puts real load on the frame, and a weak one will cause the mattress to sag faster than it should. Platform frames work best for latex, memory foam, and hybrid mattresses. Make sure the slats are no more than 3 inches apart.
If you can't agree on firmness with your partner, a topper is a cheaper fix than buying a new mattress. Two to three inches is enough to make a real difference without raising the bed too high. For couples with very different preferences, a split California king topper lets each person adjust their own side independently.
A mattress pad sits between the mattress and your sheets, adding a thin layer of cushioning while protecting the surface from daily wear. With two sleepers on it every night, that protection adds up over the life of the mattress.
Two people sleeping on the same mattress means twice the sweat, body oils, and chances of spills. A waterproof protector keeps all of that from soaking into the mattress and keeps your warranty coverage intact too.
Breathable sheets make a bigger difference on a California king because two people generate more heat than one. Cotton is a solid choice that gets softer with every wash. Check the pocket depth before buying too. California king mattresses are often thicker than standard sizes.
If you and your partner sleep at different temperatures, a wool comforter is the best middle ground. It regulates naturally without overheating either side. Some couples skip the shared comforter altogether, and each use their own.
A duvet cover protects your comforter and makes upkeep easier. Pull it off and wash it regularly instead of dealing with the comforter itself every time.
