Camas King, colchones y edredones

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King Size Mattresses, Beds & Comforters

A king size mattress measures 76 x 80 inches, the roomiest standard size for couples. Each sleeper gets 38 inches of personal width, a full twin mattress to themselves, with a dog or a kid still able to claim a corner. If one of you moves in your sleep, the other one stops noticing, which for a lot of couples is the entire reason to upgrade.

A king asks more of the room than any other size. It needs a real master bedroom, bigger bedding, and a king bed frame built for the span. What it gives back is the least-compromise sleep two people can buy in a standard size.

The king also has a trick no other size offers: the split king. Two twin XL mattresses on a split adjustable base give each sleeper independent head and foot control, so the reader can sit up while the sleeper stays flat. If you and your partner disagree about angles, that disagreement is solved by hardware, not by argument.

From the Furniture Fair Sleep Center

Robbie Daniels, Head Mattress Buyer at Furniture Fair

"The thing that actually matters with a king isn't the mattress. Measure the room and measure the stairwell first, because the nicest mattress in the world is worthless if it can't make the turn into the bedroom. I've seen it happen. After that, the real king decision is split or solid: if either of you wants different angles at night, two twin XLs on a split base ends that negotiation permanently, and it costs a bit more than the one-piece king of the same model. Get the room right, get the split question right, and the rest is just picking your comfort."

Robbie Daniels, Head Mattress Buyer, Furniture Fair

King Mattress Dimensions Compared to Other Sizes

Size Dimensions (W x L) Per-Sleeper Width Best For
Twin 38 x 75 38 inches Kids, bunk beds, guest rooms
Twin XL 38 x 80 38 inches Taller singles, adjustable bases
Full 54 x 75 27 inches Single sleepers, smaller rooms
Queen 60 x 80 30 inches Couples, master bedrooms
King 76 x 80 38 inches Couples wanting maximum space
Cal King 72 x 84 36 inches Tall sleepers, long rooms

Is a King the Right Size for Your Room?

A king bed with frame and headboard usually needs a bedroom of roughly 12 x 12 feet to keep comfortable walking space on each side and at the foot. The room check has two parts: the floor space, and the delivery path. A 76-inch mattress travels on its side, so measure every stairwell turn, hallway corner, and doorway between the truck and the bedroom.

How Much Does a King Mattress Cost?

King is the most expensive standard size in every line we carry, typically running from the mid hundreds for a starter king through several thousand for a luxury hybrid. The quality ladder works the same as other sizes: the budget band buys a perfectly serviceable guest-room-grade bed, the middle band is where most couples land, and the top band buys specialized cooling foams, denser materials, and stronger warranties. Two notes on king pricing: bedding costs more than queen at every tier, and two twin XL mattresses of the same model usually cost a bit more than one king, so going split carries a modest premium.

Choosing a King Mattress: What Actually Matters

At king scale, a few factors matter more than they do on smaller sizes:

  • Motion isolation: on 76 inches of shared surface, a mattress that absorbs movement is the difference between sleeping through your partner's 2 a.m. turn and not.
  • Split or solid: decide before buying, since a split king needs two twin XL mattresses, not one king.
  • Edge support: strong edges keep the full 76 inches usable, which matters when two people plus a dog share it.
  • Sleep temperature: two bodies under one comforter run warm, so cooling materials earn their keep at this size.

Visit a Sleep Center at Furniture Fair and try our bedMATCH diagnostic system. Both of you should lie on it together: a mattress that feels perfect alone can feel different with a partner on the other half.

King Beds, Frames & Foundations

Our king bed frames range from simple foundations to upholstered headboards, panel beds, and storage beds. Because of the 76-inch span, king frames need center support under the middle of the mattress, and most quality king frames include it. Skipping center support can void a mattress warranty, so treat it as a requirement, not an upgrade.

The adjustable base question is bigger at king than at any other size. A solid king base flexes the whole mattress as one piece, while a split king base with two twin XL mattresses gives each sleeper independent control. If one of you reads late and the other sleeps early, the split setup is worth planning for before you buy the mattresses.

King Bedding & Comforters

King comforters are typically made around 102 inches wide by 86 to 90 inches long, sized for a 76 x 80 mattress with generous overhang. King is also the size where a slightly oversized comforter pays off: the extra drape ends the nightly tug-of-war over the blanket.

Two notes worth knowing. King pillows are longer than standard, and a pair of them fills out the head of the bed nicely, which is part of why the king look reads so finished. And a Cal king comforter is longer and narrower, so king and Cal king bedding are not interchangeable even though the sizes sound similar.

Frequently Asked Questions About King Mattresses, Beds & Bedding

A king size mattress measures 76 inches wide by 80 inches long. Each of two sleepers gets 38 inches of personal width, the width of a twin, which is why king is the roomiest standard size for couples.

A standard king is 76 x 80 inches, and a California king is 72 x 84: 4 inches narrower but 4 inches longer. Tall sleepers benefit from the Cal king's extra length, while couples who value width prefer the standard king.

A king bed with frame and headboard usually needs a room at least 12 by 12 feet to keep comfortable walking space on each side and at the foot. Also measure the delivery path: a 76-inch-wide mattress has to make every stairwell turn and doorway on the way in.

A split king is two twin XL mattresses, each 38 x 80, placed side by side on a split king adjustable base. Each sleeper controls their own head and foot position independently, which solves the one-person-likes-flat, one-likes-inclined problem.

Most king mattresses work with adjustable bases, but for independent control you need a split king setup: a split base plus two twin XL mattresses, or a king mattress on a solid king base that flexes as one piece. Check that the mattress is listed as adjustable base compatible.

A king comforter is typically made around 102 inches wide by 86 to 90 inches long to cover a 76 x 80 mattress with overhang. Cal king comforters are longer and narrower, so the two are not interchangeable.

It depends on the frame. Platform beds and slatted frames support a king on their own, while a standard frame needs a foundation or box spring. Some king frames need a center support leg for the wider span, which matters for warranty coverage.

Shop King Size Mattresses at Furniture Fair

Our king mattresses are laid out Good, Better, Best so you can see exactly what changes as you move up. Our free interior design services can help you plan the master bedroom, and our Sleep Center teams can match you and your partner to the right mattress with bedMATCH. Need help getting it home? We deliver with our own crews. Nobody carries a king mattress up stairs for a living and enjoys it, so leave that part to us.

Related Categories

Depending on where you are in the decision, one of these is your next stop: