Plus Size Mattress King

A Plus Size Mattress King offers spacious comfort for sleepers who want more room to stretch out and relax. Explore king mattresses in a range of options to find the right fit for your sleep preferences, bedroom and budget, then complete your setup with a supportive bed frame and cozy bedding.

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Beautyrest PressureSmart 2.0 Plush Pillow Top 13.75" Mattress

2696

Starting at

$1200⁰⁰

$2399⁹⁹

$1200 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Purple Restore 11.5" Firm Hybrid Mattress

843

Starting at

$2700⁰⁰

$3399⁰⁰

$699 OFF

Firm Comfort, best for

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

Beautyrest PressureSmart 2.0 Firm 11" Mattress

Starting at

$1100⁰⁰

$2199⁹⁹

$1100 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest PressureSmart 2.0 Plush 11.75" Mattress

6252

Starting at

$1150⁰⁰

$2299⁹⁹

$1150 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Charlotte 2.0 Medium Euro Top Mattress

2621

Starting at

$1499⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

1443

Starting at

$1999⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 13.5" Plush Pillow Top Mattress

2795

Starting at

$1499⁹⁹

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

3306

Starting at

$1699⁹⁹

Extra Firm Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 11.25" Firm Mattress

2242

Starting at

$1299⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tulo Bamboo 10" Medium Green Tea Memory Foam Mattress

5567

Starting at

$889⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 13.5" Medium Pillow Top Mattress

1873

Starting at

$1499⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Purple Original Mattress

59759

Starting at

$1760⁰⁰

$2199⁰⁰

$439 OFF

Medium Comfort, best for

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

Beautyrest Silver BRS900 12" Plush Mattress

1149

Starting at

$1699⁹⁹

Plush Comfort, best for

Side Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Nurture Night 14.5" Pillow Top Mattress

1137

Starting at

$1249⁰⁰

Plush Comfort, best for

Side Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Elkins III 11" Plush Euro Top Mattress

1610

Starting at

$600⁰⁰

$1199⁹⁹

$600 OFF

Plush Comfort, best for

Side Sleepers
Pain
Temperature
Toss and Turn
Bed Partner

Nectar Luxe 14" Medium Memory Foam Mattress

238

Starting at

$1649⁰⁰

$2249⁰⁰

$600 OFF

Medium Comfort, best for

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

Serta Perfect Sleeper Midsummer Nights 11" Plush Eurotop Mattress

888

Starting at

$999⁰⁰

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Black Series Two 16.5" Medium Pillow Top Mattress

295

Starting at

$3699⁰⁰

$4099⁰⁰

$400 OFF

Medium Comfort, best for

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

$300 ⁶ adjustable base instant gift with purchase.

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Medium Hybrid Mattress

6031

Starting at

$3799⁰⁰

$4199⁰⁰

$400 OFF

Medium Comfort, best for

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

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

Purple RestorePlus 13" Soft Hybrid Mattress

3536

Starting at

$3600⁰⁰

$4399⁰⁰

$799 OFF

Plush Comfort, best for

Side Sleepers
Pain
Allergies
Bed Partner
Toss and Turn
Temperature

Purple Plus Mattress

2012

Starting at

$2080⁰⁰

$2599⁰⁰

$519 OFF

Medium Comfort, best for

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

Purple RestorePlus 13" Firm Hybrid Mattress

1667

Starting at

$3600⁰⁰

$4399⁰⁰

$799 OFF

Firm Comfort, best for

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

Beautyrest Black Series Three 16.75" Plush Pillow Top Mattress

1471

Starting at

$4599⁰⁰

$5199⁰⁰

$600 OFF

Plush Comfort, best for

Side Sleepers
Bed Partner
Pain
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Stearns & Foster Studio 14" Medium Mattress

1387

Starting at

$2199⁰⁰

$2499⁰⁰

$300 OFF

Medium Comfort, best for

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

Serta Perfect Sleeper Sleep Excellence Extra Firm Mattress

961

Starting at

$1449⁹⁹

$1999⁹⁹

$550 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Pain
Toss and Turn
Temperature
Bed Partner

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tempur-Pedic TEMPUR-Adapt 11" Medium Hybrid Previous Generation Mattress

942

Starting at

$2239⁷⁷

$3199⁰⁰

$959 OFF

Medium Comfort, best for

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

A plus size mattress king can provide the extra sleep space and supportive surface many couples and individual sleepers need. A standard king mattress measures 76 inches wide by 80 inches long, offering more room to spread out than a queen mattress while helping reduce motion transfer between partners. For plus size sleepers, look for a king mattress with reinforced edge support, durable coils or high-density foam, and a strong, compatible foundation. Hybrid mattresses are often a popular choice because their individually wrapped coils promote airflow, responsive support and a stable feel, while comfort layers help cushion pressure points around the shoulders, hips and lower back. The best plus size king mattress depends on your preferred sleep position, firmness level and support needs. Side sleepers may appreciate pressure-relieving memory foam or plush comfort layers, while back and stomach sleepers often prefer a medium-firm or firm king mattress that helps maintain a neutral spinal position. Couples should also consider motion isolation, cooling materials and the mattress’s weight capacity before making a purchase. A supportive mattress foundation or bed frame is equally important, so confirm that it is designed for a king size mattress and provides adequate center support. Comparing king mattresses in a range of firmnesses and materials can make it easier to find comfortable, lasting support for better zzz's.

What features are common in a plus size mattress? + -

Plus size mattresses often feature reinforced support systems, durable materials and comfort layers designed to provide a stable, supportive feel for a wide range of sleepers.

Which mattress materials are available for plus size sleepers? + -

Common options include innerspring, memory foam, latex and hybrid mattresses. Each material offers a different feel, from responsive and breathable to contouring and pressure-relieving.

How do I choose the right firmness for a plus size mattress? + -

Consider your preferred sleep position, the feel you enjoy and how much support you want from the comfort layers. Side sleepers often prefer more cushioning, while back and stomach sleepers may enjoy a firmer, more supportive feel.

What type of foundation works with a plus size mattress? + -

Choose a sturdy, compatible foundation or platform bed that follows the mattress manufacturer's support requirements. A properly matched foundation helps create a stable sleep surface.

How can I compare plus size mattresses? + -

Compare the mattress construction, firmness, comfort materials, edge support and temperature feel. Testing different options in a Mattress Firm store can also help you find a mattress that feels right for your sleep preferences.