si units.4

Hail.

It falls, we get hit on the head, we comment about its size.

In this case, I don't need to create a unit. All I am doing is noting the units universally acknowledged.

Small hail
When the ice missiles are small, their individual size is not important. What's important is the overall appearance. And everyone know that it looks like ... snow.


Bigger hail
Now the individual pellets take our attention. They are not the largest ever. So of course they are the size of ... golf balls.


Biggest hail
This is where life becomes really exciting (and insurance agencies get really panicky). At this point the standard measurement is the size of ... oranges.


And with that, we're all equipped to talk hail in the socially acceptable manner.