Minimum Viable Size for a Black Hole?

[Yora]

Planck mass works out to be relatively huge in terms of sub-atomic particles.

EDIT: Or rather, subatomic particles happen to REALLY small in terms of the 'natural' scale of mass.

The Planck Mass isn't just huge. It's another extreme limit. It's the mass required for a black hole with a diameter of a planck length. That means, the mass for tbe smallest imaginable black hole. Any mass smaller than that could never be a black hole under any imaginary circumstances as the black hole would be smaller than a planck length.

I guess we never see it mentioned much, as it's relevant to black holes, which tend to be considerably larger when studied.