The imperial system is alive and well in Korea, living peaceably alongside the metric system.

Quite apart from the usual things like Quarter Pounders and tyre measurements ....

Koreans use inches to measure trousers.

I have also seen a stationery catalogue with all of the dimensions of products shown exclusively in inches. I might add that this was from a Korean company written in Korean exclusively for the domestic market.

Additionally, because so many Korean foods are exported to the Korean communities in the USA many of the packets show ounces in large writing followed by grams.

The majority of the world population uses inches for trousers. Even in France, Germany, Belgium, the Netherlands, Norway, Spain, Portugal,... it's like that. The only thing is: the people in those countries think it's just some number that indicates the size and most of them don't even know that it indicates the number of inches.

Sorry to dissappoint you. It's just the same as with car tyres !

Yes I realise that lots of countries inadvertently use inches in different contexts without knowing that they do. (Stranger still are some of the European clothing sizes which are 'inches plus ten' measurements).

The interesting thing about Korea however is that they actually do know what inches and even ounces (on-soo) are and they happily use them.