Thread: Imperial vs Metric system

Originally Posted by _fly_

There is a nice image here London Visitor's Guide - Trafalgar Square of the standards for foot, yard etc.

The current inch is only 54 years old.

It was not until 1959 that the United Kingdom and United States redefined the yard to be exactly 0.9144 metres and hence one inch as exactly 25.4 mm. This is called the international inch.
And so it has nothing to do with the inch you used BEFORE 1959 except for the name "inch" could just as well have called it "yanks'.

Yes, but which one was the largest? I think most people can guess.
Mm.

Originally Posted by BaronJ

Isn't that an expansion tape used in pattern making ?

Only if you work in imp......