Moderators (requests and notices)

But they did have the benefit of being part of the British Empire, so there ought to be plenty of knowledge of Imperial measure among the grown-ups.

Metric all the way damn you all! I'll not budge an inch on this matter!

Sure - metric rule(r)s!

But... any person with a bit of sense knows roughly what an ounce is. And a pound, mile, foot, yard and so on. In olden days most of Europe had mixed systems and odd coinage.