8 Inch King Mattresses

Discover the perfect balance of comfort and support with our selection of 8 inch king mattresses. Designed to fit spacious bedrooms and provide ample room for restful sleep, these mattresses offer a versatile option for couples or anyone who loves extra space. Explore a variety of styles and materials to find an 8 inch king mattress that suits your sleep preferences and complements your bedroom décor. Enjoy a restful night’s sleep on a mattress that brings together quality and value for your home.

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Sierra Sleep By Ashley Peak 2.0 8" Memory Foam Mattress

Starting at

$430⁹⁹

$1150⁹⁹

$720 OFF

Medium Comfort, best for

Side, Back, Stomach Sleepers
Pain
Bed Partner
Toss and Turn

Sleepy's Basic Innerspring Firm Mattress

8610

Starting at

$220⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Temperature, Pain, Bed Partner, Allergies, Toss and Turn

Tulo Bamboo 8" Medium Green Tea Memory Foam Mattress

5501

Starting at

$293⁹⁹

$810⁹⁹

$517 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain, Bed Partner, Temperature, Toss and Turn
Pain
Temperature

Sierra Sleep By Ashley Peak 2.0 8" Hybrid Mattress

Starting at

$1150⁹⁹

Medium Comfort, best for

Side, Back, Stomach Sleepers
Pain
Bed Partner
Toss and Turn

Sealy Essentials Sudley 8.5" Firm Mattress

989

Starting at

$500⁰⁰

$1000⁹⁹

$500 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain, Temperature, Bed Partner, Toss and Turn

Sleepy's Basic Memory Foam Firm Mattress

3107

Starting at

$300⁷⁷

$1000⁹⁹

$700 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain, Bed Partner, Temperature, Toss and Turn
Support
Temperature

Sierra Sleep By Ashley Chime 8" Memory Foam Mattress

141

Starting at

$1250⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Toss and Turn

Tulo Green Tea 8" Medium Mattress

Starting at

$1070⁹⁹

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain, Bed Partner, Temperature, Toss and Turn
Bed Partner
Temperature

Sleepy's Basic Foam Mattress

1401

Starting at

$250⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain, Temperature, Bed Partner, Toss and Turn, Toss and Turn
Bed Partner

Sealy Posturepedic Pro Lacey II 15" Medium Euro Top Mattress

356

Starting at

$1949⁰⁰

$2649⁰⁰

$700 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain, Temperature, Allergies, Bed Partner, Toss and Turn
Temperature
Allergies

FREE ADJUSTABLE BASE ³ with code ELEVATE

Kingsdown Crown Imperial 16" Firm Euro Top Mattress

119

Starting at

$6899⁰⁰

Firm Comfort, best for

Back, Stomach Sleepers
Pain, Bed Partner, Temperature, Toss and Turn, Toss and Turn
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Kingsdown Crown Imperial 15" Firm Mattress

Starting at

$5999⁰⁰

Firm Comfort, best for

Back, Stomach Sleepers
Pain, Bed Partner, Temperature, Toss and Turn, Toss and Turn
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Posturepedic Plus Norman II 15" Firm Euro Top Mattress

Starting at

$1599⁰⁰

$2099⁰⁰

$500 OFF

Firm Comfort, best for

Back Sleepers
Pain, Allergies, Bed Partner, Toss and Turn
Allergies

FREE ADJUSTABLE BASE ³ with code ELEVATE

Purple Rejuvenate Royale Duke Mattress

Starting at

$7599⁰⁰

$8099⁰⁰

$500 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain, Bed Partner, Temperature, Toss and Turn, Toss and Turn
Bed Partner
Temperature

$300 adjustable base instant gift with purchase.

Serta Perfect Sleeper Charlotte 2.0 Medium Euro Top Mattress

2606

Starting at

$1500⁹⁹

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain, Toss and Turn, Pain, Temperature, Bed Partner
Toss and Turn
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's Rest Firm 2.0 Innerspring Mattress

6949

Starting at

$1250⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain, Bed Partner, Temperature, Toss and Turn

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

1407

Starting at

$1300⁹⁹

$2000⁹⁹

$700 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain, Toss and Turn, Pain, Temperature, Bed Partner
Toss and Turn
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tulo Bamboo 10" Medium Green Tea Memory Foam Mattress

5501

Starting at

$338⁹⁹

$890⁹⁹

$552 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain, Bed Partner, Temperature, Allergies, Toss and Turn
Pain
Temperature

Purple Original Mattress

30196

Starting at

$2049⁰⁰

$2199⁰⁰

$150 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Temperature, Pain, Bed Partner, Toss and Turn, Toss and Turn
Temperature
Allergies

Sleepy's By Sealy Slumber Cushion Firm Mattress

280

Starting at

$560⁹⁹

$2000⁹⁹

$1440 OFF

Medium Comfort, best for

Back, Side, Stomach Sleepers
Bed Partner, Toss and Turn, Pain, Temperature
Toss and Turn
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 12" Plush Euro Top Mattress

717

Starting at

$520⁹⁹

$1400⁹⁹

$880 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn, Pain, Bed Partner, Temperature
Pain
Bed Partner

Sleepy's By Sealy Slumber Medium Mattress

167

Starting at

$2300⁹⁹

Medium Comfort, best for

Back, Side, Stomach Sleepers
Bed Partner, Toss and Turn, Pain, Temperature
Toss and Turn
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 12" Plush Mattress

1110

Starting at

$680⁹⁹

$1700⁹⁹

$1020 OFF

Plush Comfort, best for

Side Sleepers
Temperature, Pain, Bed Partner, Toss and Turn, Toss and Turn
Pain
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Elkins III 11" Plush Euro Top Mattress

1610

Starting at

$576⁹⁹

$1200⁹⁹

$624 OFF

Plush Comfort, best for

Side Sleepers
Pain, Temperature, Toss and Turn, Bed Partner
Temperature
Toss and Turn

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Firm Mattress

4829

Starting at

$4099⁰⁰

Firm Comfort, best for

Back, Stomach Sleepers
Pain, Allergies, Bed Partner, Toss and Turn, Toss and Turn
Bed Partner
Temperature

Receive $300 Instant Gift⁴ with purchase + Calm app 3-month free trial

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Medium Mattress

3758

Starting at

$4099⁰⁰

Medium Comfort, best for

Back, Side, Stomach Sleepers
Pain, Allergies, Bed Partner, Toss and Turn, Toss and Turn
Bed Partner
Temperature

Receive $300 Instant Gift⁴ with purchase + Calm app 3-month free trial

8 Inch King Mattresses

Choosing an 8 inch king mattress is all about finding that sweet spot between spacious comfort and practical versatility, whether you’re furnishing a master bedroom, preparing a guest suite, or refreshing a vacation home as the seasons shift. The king size offers plenty of room for couples to stretch out, families to enjoy weekend snuggles, or even solo sleepers who love the feeling of extra space. With a profile that sits just right—not too tall and not too low—an 8 inch mattress can be an excellent fit for platform beds, sleek modern frames, or adjustable bases. Its streamlined height makes it easier to get in and out of bed, which is especially helpful for those who prefer a lower sleeping surface or need to accommodate mobility needs. As the days grow longer and life’s routines shift with the warmer weather, the king size becomes a hub for relaxation, movie nights, and lazy mornings when you want to savor every moment of comfort.

An 8 inch king mattress also makes a thoughtful gift for newlyweds setting up their first home together, college graduates moving into a new apartment, or parents updating a guest room in anticipation of summer visitors. Its balanced design appeals to a wide range of sleep preferences, making it a practical choice for hosts who want to ensure their guests rest well, or for families who appreciate a mattress that can adapt to changing needs over time. Whether you’re shopping during a mattress firm king size mattress sale or simply looking to upgrade your sleep experience, the 8 inch profile offers reliable support without overwhelming your space. It’s a popular option for those who enjoy a medium-firm feel, and it pairs well with a variety of bedding styles—think crisp cotton sheets in the spring, breathable linen in the summer, and cozy layers as cooler evenings return. The manageable weight of an 8 inch mattress also means it’s easier to rotate or move if you like to freshen up your room layout seasonally.

For those exploring different options, it’s worth considering how mattress thickness can influence comfort and support. While an 8 inch king mattress provides a solid foundation for many sleepers, some may prefer a slightly thicker profile for added plushness or pressure relief. If you’re curious about how a bit of extra height can enhance your sleep, take a look at our 11 Inch King Mattresses collection for more choices. No matter which thickness you choose, investing in a king size mattress is about creating a restful retreat that reflects your lifestyle, supports your well-being, and welcomes you home at the end of each day. As you browse, consider the unique needs of your household and the seasonal rhythms of your life—whether you’re hosting summer celebrations, enjoying quiet evenings, or simply seeking a better night’s sleep, the right mattress can help you make the most of every moment.