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California King Size Mattresses
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Qualifies for Costco Direct Savings. See Product Details.
PurpleRenew 11" Gel Grid Mattress
Qualifies for Costco Direct Savings. See Product Details.
Sealy Posturepedic Pro Lincoln Heights 14" Firm or Plush Mattress
Qualifies for Costco Direct Savings. See Product Details.
Kirkland Signature by Stearns & Foster 14.5" Lakeridge Mattress
Qualifies for Costco Direct Savings. See Product Details.
Novaform 14” ComfortGrande Advanced Gel Memory Foam Mattress
Qualifies for Costco Direct Savings. See Product Details.
Beautyrest 12" Silver BRS900 Medium-Firm Mattress
Qualifies for Costco Direct Savings. See Product Details.
Sealy Posturepedic Plus Prosser Hills 12" Firm or 13.5" Plush Mattress
Qualifies for Costco Direct Savings. See Product Details.
Casper Cooling Select 12" Memory Foam Mattress
Qualifies for Costco Direct Savings. See Product Details.
Sealy Posturepedic Pro Highland Manor 13" Medium Mattress
Qualifies for Costco Direct Savings. See Product Details.
Casper Cooling Select 12" Hybrid Medium Firm Mattress
Tempur-Pedic Supreme 11.5” Medium or Firm Mattress with Ergo Adjustable Base
Novaform SoFresh Plus 10” Responsive Foam Mattress
Tempur-Pedic Supreme 11.5” Medium Hybrid Mattress with Ergo Adjustable Base
Sleep Science 14" Copper Infused Firm Memory Foam Mattress with Adjustable Q-Plus Base
Sleep Science 12" iFlip Sonoma Memory Foam Mattress with Adjustable Power Base
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Your choice of mattress will set the tone for your entire day, so let’s make it a good one! For a roomy experience, you might consider one of the traditional king mattresses. But if what you want is an absolutely luxurious sleeping option, the spacious California king mattress is the one for you. Measuring in at an impressive minimum standard of 72-inches wide by 84-inches long, the California king mattress is the lengthiest and most substantial of them all. Shop Costco’s Cal king mattress selection now, and get started on a great night’s sleep.