Living i Ireland? metric is the official standard but lots of folks still use imperial . Some local softwoods may be labelled 2" x 1",r whatever, but in fact will be the nearest? metric equivalent Real PITA,
Strangely cheap tooling from the far east will be in imperial (As its mostly for the American market I suppose) which the supplier will convert to metic. The presence of strange metric dimensions may? reveal this
Of my age I was taught imperial in school. Times table up to 12 times. As the old British currency had 12 pennies to one shilling we had to learn how to convert large numbers of pence into ?.S.D. This facility with 12 is very convenient (12Inches to 1 foot) so no trouble convertinh 106" into feet and inches
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Paul Mc Cann