Sleep Number King Size

Sleep Number King Size mattresses offer a luxurious sleep experience designed for those who value space and personalized comfort. Perfect for couples or anyone seeking extra room to stretch out, these king size options bring both style and support to your bedroom. Explore a range of Sleep Number King Size choices to find the perfect fit for your sleep preferences and bedroom décor. Upgrade your rest with a mattress that adapts to your unique needs and delivers exceptional quality night after night.

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Tempur-Pedic TEMPUR-Ergo Smart Adjustable Base

725

Starting at

$2699⁰⁰

Calm app 3-month free trial with mattress purchase & registration

Sleepy's Basic Memory Foam Firm Mattress

2701

Starting at

$300⁷⁷

$1000⁹⁹

$700 OFF

Firm Comfort, best for

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

Sleepy's Basic Innerspring Firm Mattress

8308

Starting at

$300⁹⁹

Firm Comfort, best for

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

Serta Perfect Sleeper Charlotte 2.0 Medium Euro Top Mattress

2526

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 up to 499 value with code ELEVATE (must add base to cart)

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

1273

Starting at

$2000⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Beautyrest BR800 11.25" Firm Mattress

2057

Starting at

$1300⁹⁹

Firm Comfort, best for

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

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Sealy Essentials Sudley 8.5" Firm Mattress

961

Starting at

$1000⁹⁹

Firm Comfort, best for

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

Sleepy's By Sealy Slumber Cushion Firm Mattress

247

Starting at

$2000⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ up to $499 value with code ELEVATE (must add base to cart)

Tulo Lavender 8" Medium Memory Foam Mattress

461

Starting at

$295⁹⁹

$460⁹⁹

$165 OFF

Medium Comfort, best for

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

Sealy Posturepedic Plus Hybrid High Point 14" Plush Mattress

4967

Starting at

$1450⁷⁷

$2899⁰⁰

$1449 OFF

Plush Comfort, best for

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

Tempur-Pedic TEMPUR-Adapt 11" Medium Mattress

3144

Starting at

$2899⁰⁰

Medium Comfort, best for

Back;Side;Stomach Sleepers
Pain;Temperature;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-Adapt 11" Medium Hybrid Mattress

2347

Starting at

$3199⁰⁰

Medium Comfort, best for

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

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

Purple Restore Cool Touch 11.5" Hybrid Mattress

523

Starting at

$3299⁰⁰

Medium Comfort, best for

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

$300 ^◇ adjustable base instant gift with purchase.

Sleepy's By Sealy Memory Foam Firm Mattress

2701

Starting at

$1350⁹⁹

Firm Comfort, best for

Back;Stomach Sleepers
Pain;Bed Partner;Toss and Turn
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ up to 499 value with code ELEVATE (must add base to cart)

Stearns & Foster Lux Estate 16" Medium Euro Pillow Top Mattress

1532

Starting at

$4399⁰⁰

Medium Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

Tempur-Pedic TEMPUR-LuxeBreeze Soft 13" Mattress

1261

Starting at

$6399⁰⁰

Plush Comfort, best for

Side Sleepers
Pain;Bed Partner;Temperature;Allergies;Toss and Turn;Toss and Turn
Pain
Bed Partner

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

Stearns & Foster Lux Estate 14.5" Extra Firm Mattress

737

Starting at

$3799⁰⁰

Extra Firm Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

Stearns & Foster Lux Estate 16" Firm Euro Pillow Top Mattress

697

Starting at

$4099⁰⁰

Firm Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

Stearns & Foster Estate 14.5" Medium Mattress

547

Starting at

$2599⁰⁰

Medium Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

Stearns & Foster Reserve 17" Firm Euro Pillow Top Mattress

523

Starting at

$6099⁰⁰

Firm Comfort, best for

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

Receive $300 Instant Gift⁴ with purchase.

Tempur-Pedic TEMPUR-ProBreeze Medium 12" Mattress

358

Starting at

$5099⁰⁰

Medium Comfort, best for

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

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

Purple RejuvenatePremier 18.5" Mattress

339

Starting at

$8499⁰⁰

Medium Comfort, best for

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

Sealy Posturepedic Elite Brenham II 16" Medium Euro Top Mattress

309

Starting at

$2699⁰⁰

Medium Comfort, best for

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

Receive $200 Instant Gift⁴ with purchase.

Beautyrest Black Series Two 14.25" Firm Mattress

302

Starting at

$3599⁰⁰

Firm Comfort, best for

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

$300 ⁶ adjustable base instant gift with purchase.

Beautyrest Black Series One 14.75" Medium Pillow Top Mattress

301

Starting at

$3299⁰⁰

Medium Comfort, best for

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

$300 ⁶ adjustable base instant gift with purchase.

Purple RejuvenatePlus 16.5" Mattress

243

Starting at

$7499⁰⁰

Plush Comfort, best for

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

Sleep Number King Size

Choosing a king size sleep number bed is a decision that can transform the way you rest and recharge every night. As the seasons change and the days grow shorter in September, many people begin to reevaluate their sleep environment, seeking greater comfort and support for the cooler months ahead. A king size sleep solution is not just about the extra space—it’s about creating a sanctuary tailored to your unique needs. Whether you share your bed with a partner, have children or pets who occasionally join you, or simply appreciate the luxury of sprawling out, the generous dimensions of a king bed offer ample room to stretch and relax. Couples often find that a king size adjustable mattress with personalized firmness on each side helps minimize sleep disruptions, allowing both people to enjoy their preferred level of comfort. For individuals who work irregular hours or enjoy reading in bed, the versatility of adjustable support can make winding down at the end of the day more inviting and restorative.

When you evaluate the mattress retail company sleep number on king sized mattress options, it’s important to consider how your lifestyle and sleep habits will be supported by the features available. Many shoppers are drawn to the advanced adjustability and individualized support that these beds provide. Adjustable firmness is especially valuable for those with changing comfort needs, such as expectant mothers, athletes recovering from intense workouts, or anyone managing back pain or joint sensitivity. The ability to fine-tune your side of the bed can make a significant difference in your quality of rest, especially when paired with breathable fabrics and temperature-balancing materials that help regulate body heat through every season. As autumn settles in and the nights grow cooler, having a bed that adapts to your comfort preferences can make slipping under the covers an experience you look forward to each evening.

A king size sleep number bed also makes a thoughtful and practical gift, particularly for newlyweds setting up their first home together, parents celebrating a milestone anniversary, or anyone moving into a new space and looking to upgrade their sleep experience. The gift of a better night’s sleep is one that keeps on giving, promoting wellness and energy for all the moments that matter most. When considering the foundation for your new mattress, don’t overlook the importance of a sturdy, supportive base. Many shoppers choose the Sleep Number Platform Base for its compatibility and reliable support, ensuring that your investment in a king size adjustable mattress is fully realized. Ultimately, the right king size bed is more than just a place to sleep; it’s a foundation for better health, deeper relaxation, and the kind of restorative rest that prepares you for whatever the day may bring. As you explore your options, think about the features that will enhance your nightly routine and help you make the most of the cozy autumn nights ahead.