In article , says...
I buy lumber in English units (no, a 2x4 isn't
two inches by four inches, [...])

Those of us with older houses know that 2x4s were once two inches by
four inches. This makes certain maintenance tasks difficult. The meter
hasn't changed all that much over the years...
--
Kevin Willoughby lid

Imagine that, a FROG ON-OFF switch, hardly the work
for test pilots. -- Mike Collins