Rodent names????

[BoidKeeper]

There seems to be no standard for what people call their rodents. There seems to be too much termanology. Too many names to describ the same size rat.
Here is what I've always used Pinkie, fuzzie, hopper, small adult, adult jumbo. Hopper and small adult seem to be where most of the confusion occurs. I've heard weaned, small rat and a few others.

What would you call these?

This is 4" and 27g.

This is 5" and 45g.


Is there a scale somewhere, something standard? If a rat is so long and so heavy then it is called what ever, that sort of thing?
Thanks,
Trevor