Measure the mattress together with any topper or pad that will sit beneath the fitted sheet. Then compare that total height with the sheet maker's listed pocket depth and fit range. Pocket measurements vary by product.
Measure the mattress and every layer that will sit under the sheet. Brooklinen’s sheet guide gives standard pocket depths of 12 to 15 inches and deep-pocket examples of 16 to 18 inches or more; its fitted sheets list a 16-inch pocket and fit mattresses up to that depth. Other products can differ.
Measure and compare
| Step | What to do |
|---|---|
| 1. Set up the bed | Put the mattress pad or topper in place if it will stay under the sheet |
| 2. Measure the stack | Measure vertically from the bottom edge of the mattress to the top surface |
| 3. Check the product page | Find the fitted sheet’s pocket depth and stated maximum mattress depth |
| 4. Match bed size | Confirm Twin, Full, Queen, King or the exact size used by the maker |
| 5. Compare both values | Make sure the listed size and depth cover your measured setup |
Do not compare a fitted sheet with the bare mattress if you plan to keep a topper or pad underneath it. If the product page does not state a usable depth range, check the maker’s sizing information before choosing.
For a complete bedding choice, compare percale and sateen weaves or quilts, comforters and duvets. Browse sheets.
For persistent sleep problems or health concerns, speak with a doctor or sleep specialist.
Source
Common questions
Should I measure the mattress with a topper?
Yes. Include every layer that will sit beneath the fitted sheet.
Is a 16-inch pocket depth universal?
No. It is the listed fit depth for some products. Check the pocket depth and maximum fit for the exact sheet.
How do I know if my fitted sheet is deep enough?
Compare the complete mattress stack height with the maker's stated maximum mattress depth and fit range.
Does pocket depth replace checking sheet size?
No. Confirm both the bed size and the pocket depth.