Method

No pillow has been weighed, filled or slept on for this reference. Every figure is either published work, linked where it is used, or a count of what other people publish.

What does this site read?

Peer-reviewed research on pillow height and neck posture, and the specification text sellers publish on their own pages.

The research is treated as evidence. The seller text is treated as a claim by its author, and the difference is stated wherever both appear.

What is original here?

The counts. Where a number belongs to this site, it is a tally of pages read on a named date with the buckets shown.

Anyone can open the same pages and reach the same total, which is the whole appeal of the method. It is not a measurement and it is never called one.

What gets corrected?

A study superseded, a product page rewritten since it was counted, or a reader who shows the tally is wrong.

The sentence carrying the error is the sentence that gets edited, and the review date at the foot moves with it.