Via @osnews@mstdn.social on Mastodon:

There is no such thing as a 3.5 inch floppy disc

Wait, what?

The term 3.5 inch floppy disc is in fact a misnomer. Whilst the specification for 5.25 inch floppy discs employs Imperial units, the later specification for the smaller floppy discs employs metric units.

The standards for these discs are [...] all of which specify the measurements in metric, and only metric. These stand

https://www.osnews.com/story/143716/there-is-no-such-thing-as-a-3-5-inch-floppy-disc/