King Size Mattresses

A standard King mattress is 76 inches wide by 80 inches long (6 feet 4 inches by 6 feet 8 inches), or approximately 193 cm x 203.2 cm. It is the widest standard mattress size available and 16 inches wider than a Queen at the same 80-inch length. A King fits most comfortably in a room of at least 12 x 12 feet.

Leesa offers a limited lifetime mattress warranty that covers the following:

• Deterioration of the mattress resulting in a visible indentation greater than one and a half (1.5) inches that is not associated with an indentation or sag as a result of an improper or unsupportive foundation or base.
• Any physical flaw in the craftsmanship of the mattress that causes permanent damage to the memory foam despite proper set-up and normal use.
• Any physical flaw in the craftsmanship of the cover, including seams and zipper assembly.

Please see our warranty page for full details, terms & conditions.

Every Leesa mattress comes with a 120-night trial. After 30 days of sleeping on your new mattress, if you're not happy with your purchase, the friendly folks on our Comfort Crew can help walk you through the process of returning and refunding.

Whenever possible, we donate any returned mattresses to a 501(c)(3) organization or one of our charity partners. One of Leesa's missions is to be a positive force in the world, so if we can donate a mattress in good condition rather than disposing of it in a landfill, that's the route we're going to take.

For more details, check out our full trial period and return policy.

A standard King is 76 inches wide by 80 inches long. A California King is 72 inches wide by 84 inches long—4 inches narrower but 4 inches longer. The standard King is the better choice for most couples who want maximum width. The California King suits very tall sleepers (over 6 feet 4 inches) who need the extra length more than the extra width. Standard King bedding, frames, and accessories are more widely available than California King equivalents.

A King is 76 inches wide by 80 inches long—the same length as a Queen but 16 inches wider. That extra width gives each person in a couple roughly 8 more inches of personal space. A King requires more floor space, a larger room, and typically costs more at every price point. For couples who want maximum sleeping space and have the room for it, a King is worth the upgrade. For most couples in a standard bedroom, a Queen is the practical choice.

Yes, for the right bedroom. A King gives two adults 38 inches of personal sleeping space each, which is enough for most couples to sleep without regularly disturbing each other. The tradeoff is room size and cost — a King needs at least 12 x 12 feet of floor space to feel proportional, and typically costs more than a comparable Queen. For couples in a large primary bedroom who have the budget, a King is consistently worth the upgrade.

A split King is two Twin XL mattresses placed side by side on the same frame or base. Together they match the 76" x 80" footprint of a standard King. The split King setup lets each person choose their own mattress firmness and use an independent adjustable base—one partner can elevate their head while the other lies flat. It is a popular configuration for couples with different sleep preferences or for anyone who wants adjustable base functionality on a King-sized sleep surface. Leesa Twin XL mattresses are compatible with adjustable bases.

A King mattress requires at least 12 x 12 feet of bedroom floor space to leave adequate clearance on each side and at the foot of the bed. For a bedroom with two nightstands and a dresser, 12 x 14 feet or larger is more comfortable. In rooms smaller than 10 x 12 feet, a King will dominate the space and limit furniture placement. If your bedroom is in that range, a Queen is likely the better fit.

A standard King mattress is 76 inches wide by 80 inches long, or approximately 193 cm by 203.2 cm. A California King is 72 inches wide by 84 inches long, or approximately 183 cm by 213.4 cm. Leesa King mattresses range from approximately 10 to 13 inches in height depending on the model. Height affects under-bed clearance and compatibility with low-profile frames. See our sizes & weights support article for more information.

No. A King mattress is 76 inches wide and will not fit a Queen frame, which is built for 60 inches of width. Using a King mattress on a Queen frame will result in the mattress overhanging the frame on each side, which affects support and durability. King mattresses require a King-specific frame or adjustable base. Leesa's platform bed frames and adjustable bases are available in King size.

A standard King mattress uses King size sheets, duvets, and comforters—labeled “King” by bedding manufacturers. California King bedding is a different size and will not fit a standard King correctly. When shopping for bedding, confirm whether you have a standard King or a California King. Standard King bedding is widely available from most retailers.

Yes, if the room accommodates it. A King gives a solo sleeper 76 inches of width, which is generous by any measure. Solo sleepers who share the bed with a pet, move around significantly during sleep, or simply want maximum space often choose a King. The primary consideration for solo sleepers is room size—a King in a small bedroom can feel disproportionate. For solo sleepers in a large primary bedroom, a King is a perfectly legitimate choice.

Leesa King size mattresses are available across a range of price points depending on construction and features. Every model ships free and comes with a 120-night trial and a limited lifetime warranty. Visit the individual product pages for current pricing.

For couples sharing a King, a hybrid is often the stronger choice. Hybrid models offer better edge support, which matters on a King-sized shared surface where sleepers may use the full width of the bed. They also tend to sleep cooler than dense memory foam, which benefits couples who generate more combined body heat. Memory foam Kings offer excellent motion isolation, which suits light co-sleepers who are sensitive to a partner's movement. The Mattress Quiz can match you to the right construction based on how you and your partner sleep.