In Australia we used the Imperial System of Measurement up until about 1973, then it was changed to metric.
If I go to a hardware shop I can buy timber in Metric measurements, but if I go to buy a door, it's in Imperial Measurement. I don't care because I was raised with Imperial, but the younger generation, when asked for a 4 X 2 six feet long, haven't got a clue. Shoes come in various standard sizes, Imperial as we used to know it, Metric European, Metric Chinese and Imperial US. Ask a shop assistant what the differences are and watch them stumble!
Edited by toyomotor - 03-Feb-2014 at 00:17