On Fri, 12 Sept 2025 at 02:18, Paul R Anderson <[email protected]> wrote:

> Inches and millimeters have a conversion ratio where one value is
> approximately 1/29 the other. Specifically, 1 inch is equivalent to 25.4
> millimeters. The approximation is not exact but is a common comparison for
> visual estimation.
>

The inch was standardised to be exactly 25.4mm, except for the US, although
that changed in 2020 according to Wikipedia.

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