King Bed Specs

King Bed Specs make it easier to explore important details when shopping for a spacious sleep setup. Review size information, bed frame compatibility and other essential specifications to help you find the right fit for your bedroom and sleep preferences.

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Sleepy's Deluxe Mackenzie Headboard

174

Starting at

$415⁷⁹

$489¹⁶

$73 OFF

Sleepy's Basic Adjustable Base

Starting at

$299⁹⁹

FREE with select mattress purchase³.

Sleepy's Deluxe Comfort Cool Mattress Protector

4179

Starting at

$169⁹⁹

Temperature
Allergies

Save $150 when you bundle¹⁰.

Sleepy's Basic Memory Foam Firm Mattress

3213

Starting at

$299⁷⁷

$999⁹⁹

$700 OFF

Firm Comfort, best for

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

Sleepy's Signature Platform Frame

Starting at

$189⁹⁹

Sleepy's Basic Innerspring Firm Mattress

8676

Starting at

$249⁹⁹

Firm Comfort, best for

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

Tempur-Pedic TEMPUR-Ergo 3.0 Adjustable Base

3704

Starting at

$2299⁰⁰

$2399⁰⁰

$100 OFF

Beautyrest PressureSmart 2.0 Plush Pillow Top 13.75" Mattress

2695

Starting at

$1199⁹⁹

$2399⁹⁹

$1200 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

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

3631

Starting at

$2029⁷⁷

$2899⁰⁰

$869 OFF

Medium Comfort, best for

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

Beautyrest BR800 13.5" Plush Pillow Top Mattress

2784

Starting at

$819⁹⁹

$1499⁹⁹

$680 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tempur-Pedic TEMPUR-Ergo Smart Adjustable Base

986

Starting at

$2699⁰⁰

$2899⁰⁰

$200 OFF

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

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

3296

Starting at

$709⁹⁹

$1699⁹⁹

$990 OFF

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

2233

Starting at

$619⁹⁹

$1299⁹⁹

$680 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Sudley 8.5" Firm Mattress

989

Starting at

$499⁹⁹

$999⁹⁹

$500 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

Tulo Bamboo 10" Medium Green Tea Memory Foam Mattress

5555

Starting at

$379⁹⁹

$889⁹⁹

$510 OFF

Medium Comfort, best for

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

Tulo Bamboo 12" Medium Plush Green Tea Memory Foam Mattress

5555

Starting at

$429⁹⁹

$1019⁹⁹

$590 OFF

Medium Comfort, best for

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

Beautyrest BR800 13.5" Medium Pillow Top Mattress

1863

Starting at

$819⁹⁹

$1499⁹⁹

$680 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Bedgear Dri-Tec Mattress Protector

150

Starting at

$189⁹⁹

Temperature
Allergies

Tulo Bamboo 8" Medium Green Tea Memory Foam Mattress

5555

Starting at

$329⁹⁹

$809⁹⁹

$480 OFF

Medium Comfort, best for

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

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1745

Starting at

$809⁹⁹

$1099⁹⁹

$290 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Purple Original Mattress

59743

Starting at

$1760⁰⁰

$2199⁰⁰

$439 OFF

Medium Comfort, best for

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

Sleepy's By Sealy Slumber Cushion Firm Mattress

301

Starting at

$1999⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Winter Green 13" Plush Euro Pillow Top Mattress

548

Starting at

$779⁹⁹

$1459⁹⁹

$680 OFF

Plush Comfort, best for

Side Sleepers
Bed Partner
Pain
Temperature
Toss and Turn
Allergies

Beautyrest BR800 12" Plush Euro Top Mattress

735

Starting at

$569⁹⁹

$1399⁹⁹

$830 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

Bedgear StretchWick Mattress Protector

155

Starting at

$129⁹⁹

Temperature
Allergies

Sleepy's By Sealy Slumber Medium Mattress

175

Starting at

$709⁹⁹

$2299⁹⁹

$1590 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

A standard king bed measures approximately 76 inches wide by 80 inches long, giving two sleepers the same personal space as a twin bed each. This spacious mattress size is an excellent choice for couples, sleepers who like to spread out and families who share the bed with children or pets. King mattress dimensions can vary slightly by manufacturer, while the bed frame, foundation and headboard may add several inches to the overall footprint. For comfortable movement around the bed, plan for a bedroom that is at least 12 feet by 12 feet, then measure doorways, hallways and stairways before delivery. A king bed frame may include storage drawers, a platform base or adjustable bed compatibility, so review the complete assembled dimensions before choosing your room layout. A California king mattress measures about 72 inches wide by 84 inches long, making it four inches narrower and four inches longer than a standard king. It can be a practical option for taller sleepers or bedrooms that are longer than they are wide. A split king uses two twin XL mattresses, each measuring approximately 38 inches by 80 inches, for the same overall dimensions as a standard king. Split king beds work well with adjustable bases because each side can be raised or lowered independently, although they require two compatible mattresses, fitted sheets and mattress protectors. For the best fit, select king-size bedding for a standard king, California king bedding for a California king and split king sheets or two twin XL sheet sets for a split king.

What materials are commonly used to make king beds? + -

King beds are commonly made with solid wood, engineered wood, metal or upholstered materials. The best choice depends on your preferred style, maintenance needs and bedroom design.

What type of support system can a king bed have? + -

King beds may include wood slats, metal slats, a platform base or a separate foundation. Check the bed’s specifications to confirm which support system is included and whether a compatible foundation is required.

Can a king bed include a headboard and footboard? + -

Some king beds include a matching headboard or footboard, while others are designed to work with separately purchased pieces. Review the product specifications for included components and attachment requirements.

What features should I look for in king bed construction? + -

Look for details such as reinforced joints, center support, durable hardware and a well-constructed frame. Upholstered models may also feature padded panels, while wood and metal frames can offer distinct design details.

Are king beds compatible with adjustable bases? + -

Compatibility varies by bed design. Some frames are built for use with an adjustable base, while others require the frame to be removed or may not support one. Check the manufacturer’s specifications before pairing them.