King Size Bedding Dimensions

Updated October 13, 2026 · By Serge, King Size Bed

There is no standard size for king bedding, only for the mattress (76 x 80 in). Across the size charts of 19 US bedding brands, the median king comforter is 108 x 93 inches, the duvet cover 108 x 94, the flat sheet 110 x 105 and the blanket 108 x 92. The fitted sheet is 76 or 78 x 80 inches, and the one size every brand agrees on is the king pillow: 20 x 36 inches.

We read the king and California king sizes that 19 US bedding brands print on their size charts and product pages on October 12, 2026, one figure per brand and item. The spread is wide: the ten brands that list a king comforter give ten different sizes.

King size bedding dimensions chart

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The first figure is the width across the bed, the second the length from head to foot. For pillows and pillowcases, the short side comes first. In centimeters, a 108 x 93 inch comforter is about 274 x 236 cm, and a 20 x 36 inch king pillow 51 x 91 cm.

King size comforter dimensions

At the median, a king comforter is 108 x 93 inches. The ten brands we read range from 104 to 112 inches across and from 88 to 100 inches long, and no two print the same size. A comforter is cut larger than the 76 x 80 inch mattress so it drapes over the sides: a 108 inch comforter leaves 16 inches on each side.

How much of that hangs below the mattress depends on its thickness:

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Arithmetic for the median 108 inch comforter on a 76 inch wide mattress. A tall mattress or a box spring is the usual reason to look for an oversized king.

Oversized king comforter size

An oversized king is a king comforter or duvet cut larger, for more drop. Only one of the 19 brands in the chart above prints it as its own size. To see what the size means elsewhere, we read the oversized king comforters, duvet inserts, duvet covers and quilts of US online bedding stores on October 13, 2026: 35 listings printed their dimensions, at five stores, one of which listed 18 of them.

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At the median, an oversized king comforter was 116 x 98 inches, 12 inches wider and 8 inches longer than the regular king of the same product. On a 76-inch mattress, 116 inches leaves 20 inches on each side, 6 more than a 104-inch king. The regular kings of these products were smaller than the 108 x 93 inch median of the brands above, so the gain over your own king comforter may be less. One store calls the size "Oversized King/Cal King" and sells it next to a 108 x 96 inch regular king; three more sell an oversized king without printing its size, so check the label.

Choose an oversized king for a mattress thicker than about 14 inches, a box spring, or a frame with wide padded rails. Our cloud bed frames are up to 93 inches wide, so a regular 108 inch comforter covers less of their rails than of a plain frame.

King duvet cover and insert sizes

A duvet cover is the case; the insert is the filling inside. At the median, king covers are 108 x 94 inches and inserts 110 x 98. Of the 12 brands that print both, 5 give the cover and the insert the same size, and 6 make the insert 0 to 6 inches larger, so it fills the corners. If you buy them from two different brands, compare the two sets of numbers before you order.

King size sheet dimensions

• Fitted sheet: 78 x 80 inches in 8 of 12 brands, 76 x 80 in the other 4, over a 76 x 80 inch mattress. The number that matters is the pocket depth: 15 to 17 inches in the 11 brands that print it, 16 at the median. Measure your mattress, topper included, and leave an inch or two.
• Flat sheet: 110 x 105 inches at the median, from 108 x 102 to 114 x 114. On a 12 inch mattress, a 110 inch flat sheet leaves about 5 inches to tuck under on each side.
• Pillowcases: king pillowcases are usually 20 x 40 inches, longer than the 36 inch pillow so it slides in easily.

King size blanket dimensions

At the median, 108 x 92 inches. Blankets vary more than any other item: from 108 x 90 to 120 x 120 inches across the five brands we read. A blanket usually sits under the comforter, so it can be a little smaller than the comforter without showing.

King size pillow dimensions

A king pillow is 20 x 36 inches in all eight brands that list one. Across a wider sample of 21 brands, 15 used that size; our pillow sizes chart has every size and the pillowcases. A standard pillow is 20 x 26 inches in six of eight brands, and a queen pillow 20 x 30. Two king pillows side by side are 72 inches wide, close to the 76 inch width of a king mattress; three standard pillows take 78 inches, about the same width. King shams are 20 x 36 inches in four of five brands.

King quilt dimensions

Quilts and coverlets come in sizes close to comforters: 108 x 92 inches is the size the brands we read print most often, up to 114 x 96.

Does king bedding fit a California king?

Mostly yes, except the fitted sheet. Of the 14 brands that sell king duvet covers, 12 also cover the California king, and all 12 give it the same size as the king. Comforters, inserts, quilts and blankets are sold as one "King/Cal King" size by most of the brands that mention it. The fitted sheet is the exception: the California king version is 72 x 84 inches in 11 of 12 brands, because the mattress is 4 inches narrower and 4 inches longer. Our California king bed dimensions guide has the frame sizes.

How to choose king bedding

1. Measure the mattress thickness first: it sets the fitted sheet pocket and how far the comforter hangs.
2. Read the size on the label, not the name. A king comforter can be 104 or 112 inches wide depending on the brand.
3. Match the duvet cover to the insert, ideally from the same brand.
4. Allow for the frame. Wide padded rails or a tall platform call for more drop, or an oversized king. Every bed we sell lists its outside size on the product page; our king size bed dimensions guide compares frames.

Bedding follows the mattress, the frame is always bigger: see the bed frame sizes for every US bed, from twin to California king.

Shop king beds by style

Every bed in these collections lists its outside size on the product page, so you can check it against your room and your mattress before you order.

• All king bed frames
• By build: king platform beds, upholstered king beds, wood king bed frames, king beds with storage and king beds with drawers
• By height: low profile king beds, king floor beds with no gap underneath, king bed frames high off the ground with 10 to 14 inches underneath, and king beds with a tall headboard
• By look: modern, mid-century, rustic, cloud beds, velvet, black, brown, beige, gray, white and cream, wingback, boucle, linen, faux leather, solid wood, canopy, sleigh, rattan, metal, tufted, farmhouse and panel king beds, and king beds with a bookcase headboard
• For a 72 x 84 inch mattress: California king bed frames, including California king platform beds that need no box spring
• A few of our king beds: Burbank cloud bed with side shelves, Biloxi canopy bed, Montauk storage bed with 8 drawers and Fresno wood platform bed

Bedding sizes: the king and California king sizes printed in the size charts and product pages of 19 US bedding brands, read on October 12, 2026; one figure per brand and item, from the main page of each brand; editorial blogs and older or conflicting pages left out. Medians are taken on width and length separately. Drop and tuck: arithmetic on a 76 x 80 inch king mattress. Oversized king: the dimensions printed for 35 oversized king comforters, duvet inserts, duvet covers and quilts at five US online stores, and for the regular king of the same product, read on October 13, 2026.

Dressing the room as well as the bed? Here is what size rug goes under a king bed.

Still choosing the size? Our king vs queen bed comparison has the numbers side by side.

Bedding for the other sizes starts with the mattress: queen size bed dimensions, full vs queen bed and twin XL bed dimensions.