Even in countries where one measurement standard predominates, there are tiny things that have become exclusively measured in the other. For example, most people know that American large sodas exclusively come in litres while small sodas still come in oz. But I found it odd that backpack sizes are also exclusively denominate in litres in the US.
On the flip side, in Australia, I’m pretty sure all conversations around penis size were denominated in inches. I’m not even quite sure what the size of my penis is in cm. I’m curious if this applies to other metric countries as well?
What are some other exceedingly specific, random items that end up being denominated in the opposite measurement system?