The California King mattress is the longest standard mattress size available, measuring 72” wide by 84” long. BedInABox® California King mattresses take up slightly less space than standard kings, the size difference coming down to preference in length vs. width.
A California King size mattress is 72 inches wide by 84 inches long.
Bed Sharing
California King mattresses give couples enough space to spread out while leaving plenty of leg room for the kids or pets to join.
Primary Suites
Since the California King provides so much space, this mattress size is ideal for larger primary bedrooms.
Tall Adults
California King beds are 84 inches long; 4 inches longer than a standard king and only slightly narrower.
Try your California King mattress in a box risk-free for 120 nights. If you don’t love your new BedInABox® after sleeping on it for 60 nights, let us know and we will get the return process started. Details can be found in our Return Policy.
All BedInABox® California King size mattresses use carefully crafted BedInABox® memory foams that are CertiPUR-US® certified. This means that the foam has been tested by accredited labs and has been certified as safe to sleep on for the whole family. We use multiple layers of our house-made memory foam to provide the perfect balance of support and pressure relief, for sleepers of all ages.
We partner with Affirm to offer flexible financing options, so you can pay with fixed monthly payments with rates between 0-30% APR. Simply select Affirm at checkout and complete an application that won’t affect your credit score. Prequalify Now.
Create a more supportive sleeping experience by pairing your California King size mattress with a California King size foundation. A mattress foundation serves as a base for your mattress and generally uses solid planks or slats to support and lift your mattress off the ground. There are different types of foundations suited to different mattresses and sleep preferences, BedInABox® currently offering two options compatible with a Cal King mattress: a slatted foundation and a platform foundation.
Provides simple, slatted support for memory foam or hybrid mattresses. This sturdy foundation is available in a 5” profile or an 8” profile and can be paired with optional foundation legs for additional height.
Best described as a combination of a standard mattress foundation and a decorative bed frame, our upholstered platform offers a slightly lower profile than pairing a solid foundation with a separate bed frame and is compatible with all BedInABox® mattresses.
Our 9” Essential mattress is a simpler take on our Original Mattress, utilizing the same dual layer memory foam technology in a slightly thinner, medium-firm mattress profile.
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The Original mattress is our classic 11” dual-layer memory foam mattress. The two layers combine plush, temperature regulating comfort and medium-firm support to provide the perfect level of contouring alignment.
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The Azul® mattress features 11” of cooling comfort. The dual layer medium-soft mattress tops multiple layers of phase change material with an UltraCool® soft knit cover to offer our most advanced cooling system.
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11" of our classic CoolRest® Gel memory foam construction, enhanced with spring support for added lift.
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The Tranquillium® mattress is built with 12” and three layers of firm memory foam to maximize support without sacrificing comfort.
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The Dual Hybrid® mattress is 13” of premium comfort, combining the support of memory foam and springs. The BedInABox® hybrid mattress features the highest coil count in the industry to provide ultimate lift, support and pressure relief exactly where you need it.
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