"Except in the United States".

Alas a .04 round down, couldn't even give him the benefit of a 2.6.

Which is why a more dynamic measurement is preferred. 2.54 could be very different from 2.5 depending on the girl on the receiving end. You don't exactly go and say, it's not 1', honey, I'm 1.05'. It beats the point of the imperial system to borrow the metric expression.