Has England Gone 100% Metric?

[Sparky812]

@Bones_Daley

Okay, let’s leave out the word “gauge” altogether, since it appears to be causing confusion , and just re-iterate the bare bones of the question.

Why do US based manufacturers of plectrums, or picks, choose to denote the thickness of these picks in millimeters, instead of thousandths of an inch ?

Because the sheets of plastic that the picks are punched out of are measured in mm.