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.Shop Now
California King Mattresses
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.
How big is a California king size mattress?
A California King size mattress is 72 inches wide by 84 inches long.
Who should sleep on a California King mattress?
California King mattresses give couples enough space to spread out while leaving plenty of leg room for the kids or pets to join.
Since the California King provides so much space, this mattress size is ideal for larger primary bedrooms.
California King beds are 84 inches long; 4 inches longer than a standard king and only slightly narrower.
Free shipping, easy returns
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.
Safe, luxurious sleep
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.
Which California King Size BedInABox® is right for you?
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.Shop Now
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.Shop Now
11" of our classic CoolRest® Gel memory foam construction, enhanced with spring support for added lift.Shop Now
The Tranquillium® mattress is built with 12” and three layers of firm memory foam to maximize support without sacrificing comfort.Shop Now
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.Shop Now