King Mattress Size Guide
The King is the widest standard US mattress — 16 inches wider than a Queen, ideal for couples who want maximum personal space or those who co-sleep with children or pets.
About the King Size
The King mattress measures 76 inches wide by 80 inches long — 16 inches wider than a Queen. At over 6 feet wide, a King mattress gives each partner approximately 38 inches of personal sleeping space, equivalent to a Twin XL width. This extra space is transformative for couples where motion transfer is a concern, those with pets or children who share the bed, or simply those who prefer more personal room during sleep. The King's footprint requires a larger room — most interior designers recommend a room of at least 12×12 feet to maintain adequate walking space around the bed. King-size bedding, while available everywhere, is priced significantly higher than Queen at every tier. Box springs and bed frames for Kings are also heavier and more expensive. For couples with the room and budget, a King delivers a qualitative improvement in sleep comfort that reviewers consistently describe as 'game-changing.'
Best For
- ✓Couples wanting maximum space
- ✓Families who co-sleep with children or pets
- ✓Restless or hot sleepers sharing a bed
- ✓Large master bedrooms (12×12+ feet)
- ✓Those with adjustable bases (use two Twin XL for Split King)
Not Ideal For
- ✗Rooms under 12 feet wide
- ✗Budget-sensitive buyers (King-size everything costs more)
- ✗Single sleepers (Queen is more than sufficient)
Top Mattresses Available in King
Best for: Budget shoppers · Side sleepers
Why it stands out: Three-inch memory-foam comfort layer gives the Medium more contouring than a thin budget foam bed
Keep in mind: Deep memory-foam contouring can feel slower to move on than a hybrid
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Best for: Budget shoppers · Combination sleepers
Why it stands out: Cool-to-touch fabric and multiple memory-foam layers
Keep in mind: Limited information on foam density and cover materials
Best for: Stomach sleepers · Back sleepers
Why it stands out: Extra-firm support for shoppers who want less sink
Keep in mind: Extra-firm feel may be uncomfortable for many side sleepers
Best for: Side sleepers · Back sleepers
Why it stands out: Fast-response Memory Foam and copper foam
Keep in mind: The listing uses both extra-plush and medium-firm descriptions
Best for: Side sleepers · Back sleepers
Why it stands out: Cool-to-touch top panel and three-zone foam
Keep in mind: Exact foam densities and cover fiber content are not published
Best for: Value focused shoppers who want a conventional medium firm memory foam feel · Back and stomach sleepers who do not need an extra firm surface
Why it stands out: Certification scope is specific: CertiPUR-US covers the foam layers and OEKO-TEX STANDARD 100 covers only the knit cover; Bare Home separately states that the mattress is fiberglass-free
Keep in mind: Only one feel is offered, and Bare Home itself says lighter side sleepers may prefer something softer
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100-night Good Dreams comfort trial at Bare Home
King Size — Frequently Asked Questions
How much wider is a King than a Queen?
A King is 76 inches wide vs. a Queen's 60 inches — a 16-inch difference. Each partner on a King gets 38 inches of personal space (twin-XL width) vs. 30 inches on a Queen.
What room size do I need for a King?
Minimum 12×10 feet with adequate walking space. Most design guidelines recommend 12×12 feet or larger for a King with comfortable clearance on all sides and at the foot.
King vs. California King — which should I choose?
King (76×80) is wider; California King (72×84) is narrower and longer. Choose King for width (couples, restless sleepers). Choose Cal King for length (adults over 6'4") or narrower rooms. Cal King bedding is harder to find than King.
Can a King fit through a standard door?
King mattresses shipped as compressed 'bed in a box' fit through standard doors. Traditional innerspring Kings must be maneuvered — delivery teams are experienced at this but tighter stairwells can be challenging. White-glove delivery (Saatva, etc.) handles setup.
Is King bedding significantly more expensive?
Yes — King sheets typically cost 20–40% more than the same Queen sheet set. King comforters, duvet inserts, and protectors follow similar premiums. Budget this ongoing expense into your decision.