Sheet sizes: matching bedding to your mattress
The size on the label is half the story. Pocket depth decides whether the corners stay on.
Short answer: buy sheets labeled for your mattress size, then match the pocket depth to your mattress's height, counting any topper or pad.[1 · Oct 29, 2026] Standard pockets fit mattresses about 7 to 14 in thick; extra-deep pockets fit about 16 to 24 in.[1 · Oct 29, 2026]
Pocket depth
| Fits mattresses about | |
|---|---|
| Standard | 7–14 in[1 · Oct 29, 2026] |
| Deep | 7–15 in[1 · Oct 29, 2026] |
| Extra-deep | 16–24 in[1 · Oct 29, 2026] |
Standard sets may not fit mattresses over 14 in thick.[1 · Oct 29, 2026] One maker puts a standard pocket's limit nearer 12 in, and warns that a 14 in mattress plus a protector is when a corner pops off at night.[2 · Oct 29, 2026] Labels vary by brand, so read the pocket depth printed on the package.
How to measure for sheets
- Check the mattress size (twin, queen and so on). Fitted sheets labeled with that size match its width and length, for example 60 × 80 in for a queen.[2 · Oct 29, 2026]
- Measure the height from the bottom seam to the top of the mattress, including any topper or mattress pad.[1 · Oct 29, 2026]
- Pick a pocket depth at least that deep.
Queen bedding, for scale
| Item | Queen size |
|---|---|
| Fitted sheet | 60 × 80 in[2 · Oct 29, 2026] |
| Flat sheet | about 90 × 102 in[2 · Oct 29, 2026] |
| Comforter or duvet | 88–90 in wide × 92–100 in long[2 · Oct 29, 2026] |
| Pillows | queen, 20 × 30 in[2 · Oct 29, 2026] |
One maker's queen bedding guide.[2 · Oct 29, 2026] Flat sheet and comforter sizes vary by brand. A quick check for drape: subtract the mattress width from the comforter width and halve it. A 90 in comforter on a 60 in queen hangs about 15 in over each side.[2 · Oct 29, 2026]
Split king, Olympic queen and other specialty sizes
- Split king: two 38 × 80 in mattresses.[3 · Oct 29, 2026] That's the same width and length as a twin XL,[4 · Oct 29, 2026] so each half takes twin XL fitted sheets (our comparison). Check pocket depth as usual.
- Olympic queen and California queen: their sheets are specialty items that are harder to find and cost more.[2 · Oct 29, 2026]
- California king and twin XL: sheets and blankets for these less common sizes tend to cost more.[4 · Oct 29, 2026]
Can a king flat sheet and duvet cover a split king? Unverified. We couldn't confirm a reliable source for this yet. It depends on the brand's sizes.
Affiliate links: if you buy through a link in this box we may earn a commission, at no extra cost to you. It does not change the sizes or sources on this page. How we handle affiliate links.
Sources: 1. Sleep Foundation, Bed sheet sizes. 2. Casper, Queen size bed dimensions: size, room fit, and how it compares. 3. Saatva help, What are the dimensions of the Saatva foundation?. 4. Sleep Foundation, Mattress sizes and dimensions guide. Checked Oct 29, 2026. Trademarks belong to their owners; figures are restated in our own words and tables, not reproduced.