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CozyLinenNook

Tool

Pocket Check

A fitted sheet comes off a corner because the pocket ran out before the stack did. This adds your layers together and tells you the depth you actually need, then shows which sets in this catalog state a depth that reaches it. It is arithmetic on published numbers, and it stops there.

Mattress thickness, inches

Topper on it

Mattress protector under the sheet

The arithmetic, in full

stack = mattress + topper + protector allowance, where the protector allowance is 0.25 in when one is present and 0 in when it is not.

required pocket = stack + 2 in, because a fitted sheet has to reach around the stack and still turn under to grip.

The 2 in allowance is this site’s assumption, not a manufacturer figure. Makers do not all measure pocket depth the same way, so treat the result as a floor rather than a promise.

Bed corner in section, drawn to scaleBed corner in section. Mattress 12 inches, protector 0.25 inches, total stack 12.25 inches. Bracketed pocket depth 14.25 inches. The bracket clears the stack by 2 inches.0481216INCHESMattressProtectorPocket 14.25 inStack 12.25 in
The bracket here is the pocket depth you need, not one a listing offers.
Stack height
12.25 in
Pocket depth needed
14.25 in

Sets in this catalog stating a depth that clears it

  • Bare Home 1800 Sheet Set, Twin XL— the listing states 6 to 15 in
  • BEDELITE Satin Sheet Set, Queen— the listing states 15 in
  • California Design Den Cotton Sateen Sheets, Queen— the listing states 16 in
  • RUVANTI Cotton Percale Sheets, Queen— the listing states 16 in
  • Bedsure PureWoven Rayon from Bamboo Sheets, Queen— the listing states 16 in
  • Queen Sheet Set, 16 in Deep Pocket, Grey— the listing states 16 in

This is arithmetic on stated numbers and nothing more. It does not say a particular sheet will fit a particular mattress, because that depends on how the maker measured. See Sizes for where the dimensions themselves get confused, and Sheets for what pocket depth is measuring in the first place.

What this cannot tell you

It cannot tell you that a particular sheet will fit a particular mattress. Manufacturers measure pocket depth differently, some from the seam and some from the finished corner, and a stated figure is not a guarantee of anything. What this does is add up the numbers you gave it and compare the result against numbers sellers published. If the two are close, the answer is no.

The 2 inch turn-under allowance is this site’s assumption. It comes from ordinary practice rather than a standard, and it exists because a sheet that just barely reaches the bottom edge has nothing left to hold on with.

The depths this catalog contains

8 of the 12 sheet sets here state a depth. The distinct figures are 14 in, 15 in, 16 in, which means the shallowest is 14 in and the deepest is 16 in. Any stack needing more than 16 in of pocket has nothing in this catalog that states enough, and the tool says so rather than offering a near miss.

The layer that most often causes the problem is the one people add last. See Mattress Topper for why, and Sheets for what pocket depth is measuring in the first place.