Size charts
Sheet Size Chart by Bed Size
Quick answer
Fitted sheets match the standard mattress size exactly: Twin 38x75 in, Twin XL 38x80 in, Full 54x75 in, Queen 60x80 in, King 76x80 in, California King 72x84 in. Flat sheets are cut larger than the mattress to allow tuck-in, and there is more variation between brands on flat sheet dimensions than on mattress sizes, so no single flat sheet number applies to every brand's "Queen" or "King" listing. A fitted sheet's pocket depth is a separate spec from its width and length: standard fits up to 12 in, deep fits 13 to 17 in, extra deep fits 18 to 22 in.
A fitted sheet is sized to the mattress, which is standardized. A flat sheet is sized larger than the mattress on purpose, to leave enough fabric to tuck in at the sides and foot, and that extra margin is where brands diverge from each other. Treating a "Queen flat sheet" as a fixed number the way a Queen mattress is a fixed number is the mistake that leads to a flat sheet that is either too skimpy to tuck or bunches up in a pillowcase-sized pile at the foot of the bed.
On this page
Fitted sheet dimensions by mattress size
| Mattress size | Width (in) | Length (in) |
|---|---|---|
| Twin | 38 | 75 |
| Twin XL | 38 | 80 |
| Full (Double) | 54 | 75 |
| Full XL | 54 | 80 |
| Queen | 60 | 80 |
| King (Eastern King) | 76 | 80 |
| California King | 72 | 84 |
Industry standard
These are standard published dimensions, the same across manufacturers.
A fitted sheet's width and length match the mattress it is sold for exactly, since mattress sizes are standardized. What varies by brand is the pocket depth, how far the sheet's corner elastic reaches down the side of the mattress, covered in the sheet pocket depth chart.
Real sheet products with a published pocket depth
| Product | Mattress size sold for | Published pocket depth (in) |
|---|---|---|
| Hearth & Harbor Extra Deep Pocket Queen | Queen | 18 to 24 |
| Hearth & Harbor Extra Deep Pocket King | King | 18 to 24 |
| Utopia Bedding Extra Deep Pocket Queen Fitted Sheet | Queen | 16 to 21 |
| Utopia Bedding Extra Deep Pocket King Fitted Sheet | King | 16 to 21 |
| Bedsure Deep Pocket Queen Sheet Set | Queen | Up to 21 |
| HYPREST King Sheets, 18 Inch Deep Pocket | King | Up to 18 |
Industry standard
These are standard published dimensions, the same across manufacturers.
These are the products in this catalog that publish an exact pocket depth in their own listing: Hearth & Harbor Extra Deep Pocket Queen Sheets Sets - Fits Mattress 18-24 Inch, Hearth & Harbor Extra Deep Pocket King Size Sets - Fits Mattress 18-24 Inches , Extra Deep Pocket Queen Fitted Sheet, Extra Deep Pocket King Fitted Sheet, Bedsure Deep Pocket Queen Sheets Set - Fits Mattresses Up to 21 Inches Thick - and HYPREST King Sheets Pattern 18 Inch Deep Pocket Light Grey Leaf Floral 4 PC. Most sheet listings do not state one at all, which is why the general pocket depth classes exist as a fallback.
Why flat sheet dimensions are not standardized like mattress sizes
A flat sheet is deliberately cut wider and longer than the mattress it is sold for, since its job is to sit on top of the sleeper and still have enough fabric left over at the sides and foot to tuck under the mattress. How much extra fabric a brand adds to that margin is a design choice, not a regulated dimension, so two sheet sets both labeled "Queen flat sheet" can differ by several inches in either direction. There is meaningfully more variation between brands on flat sheet size than there is on mattress size itself. Check the specific product's stated flat sheet dimensions on the listing before assuming a size name guarantees a particular fit, especially if you prefer a deep tuck at the foot of the bed.
What counts toward a fitted sheet's pocket depth
Pocket depth is measured against the mattress plus anything sitting between it and the sheet, most commonly a topper or a mattress protector, not the mattress alone. A 12 inch mattress with a 3 inch topper needs a sheet rated for 15 inches, already past standard pocket depth. Work out your own exact stack at Sheet Pocket Depth Calculator before buying, and see mattress thickness classes on the mattress thickness chart.
Shop sheets by size and pocket depth
Bedsure Queen Sheet Set - 4 Pieces Soft
$14.39Queen sheet.
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Hearth & Harbor Extra Deep Pocket Queen Sheets Sets - Fits Mattress 18-24 Inch
$26.99Queen sheet set of 6, a stated pocket depth of 18 to 24 in.
Check price on Amazon Hearth & Harbor Extra Deep Pocket King Size Sets - Fits Mattress 18-24 Inches
$28.49King sheet set of 6, a stated pocket depth of 18 to 24 in.
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Extra Deep Pocket King Fitted Sheet
$19.99King sheet, a stated pocket depth of 16 to 21 in.
Check price on AmazonFrequently asked questions
Does a fitted sheet match the mattress size exactly?
Yes. A fitted sheet's width and length are cut to match the standard mattress size it is sold for, so a Queen fitted sheet is built around a 60 by 80 inch mattress footprint. What varies between brands is not the width and length, which follow the standardized mattress size, but the pocket depth, how far the elastic corner reaches down the side to clear the mattress plus any topper or protector.
Why do flat sheets vary in size between brands?
A flat sheet is deliberately cut larger than the mattress so there is enough fabric left over to tuck in at the sides and foot of the bed, and how much extra margin a brand builds into that allowance is a design choice rather than a regulated dimension. Two "Queen" flat sheets from different brands can differ by several inches. Check the specific listing's stated flat sheet dimensions if a generous tuck matters to you.
What sheet size do I need for a 14 inch mattress?
The width and length still follow the mattress size itself, for example 60 by 80 inches for a Queen. The pocket depth is the separate spec that changes: a 14 inch mattress alone fits a deep pocket sheet, rated 13 to 17 inches, but a topper or thick protector on top can push the combined stack into extra deep pocket territory, rated 18 to 22 inches.
Can I use Full sheets on a Twin XL mattress?
No. Full and Twin XL are different footprints, 54 by 75 inches versus 38 by 80 inches, so a Full fitted sheet will not stretch correctly over a Twin XL mattress even though both are common dorm and single-sleeper sizes. Match the fitted sheet to the exact mattress size, not just to a general sense of "single bed," since Twin, Twin XL and Full are three separate standard sizes.
What is the deepest pocket sheet sold off the shelf?
Extra deep pocket, rated 18 to 22 inches, is the deepest standard pocket class. Some specific products in this catalog publish an exact depth within or near that range, such as sheets stated at 18 to 24 inches on their own listing. There is no standard class above 22 inches; a stack deeper than that needs a sheet that states its own exact depth or sheet straps to hold a shallower sheet in place.
Do I need to know my mattress thickness before buying sheets?
Yes, along with any topper or protector thickness added on top, since those stack together to determine the pocket depth a fitted sheet needs to clear. The width and length of the sheet are set by the mattress size alone and do not change with thickness. Work out the full stack at Sheet Pocket Depth Calculator rather than guessing from the mattress thickness printed on the box.
How to read the numbers on this page. Standard mattress and bedding dimensions are industry-wide and the same across manufacturers. Guidance like replacement intervals, firmness by body weight and walking clearance is convention rather than a measured standard, and every table here says which it is. Where a manufacturer does not publish a figure we leave it out instead of estimating. This is not medical advice: a mattress is not a treatment for a medical condition, and persistent pain is a reason to see a clinician.