” “BTW, R’ Belsky’s 1-2mm was the length, (it is thinner than that) which is why what he’s saying is not ridiculous”
We’re talking about length, so what’s the ?????? “
It’s ? ????? he discredits reports of up to 5mm (although I don’t think that’s what you meant.)
The issue here is whether they are visible at a smaller size then 30-50 microns when the length is much bigger (as is even 1-2mm).
Can you see the tiny fibers protruding from a cloth? They are thinner than a human hair.