NEWB question - re: petite robustos

[RevSmoke]

I know this doesn't matter, but I got to reading some stuff and it got me to cogitating (Yeah, not good for me to do on my day off).

In the past, I have thought of petite robustos to be something under 4.5 inches (3.5-4" was my though) and less than a 50 ring guage (44-48 was my thought).

So, is there a pat answer in the matter, or does it vary.

I looked this up, and while there are some marcas that list having petite robustos, I couldn't find is listed as a particular vitola anywhere.

Now, here's another thought - I now the words are often used interchangably, is there a difference between a rothschild -vs- robusto? Or, as I have figured for all these years, some just call their robustos a rothschild?

or:
Petite Robusto 3.5-4X44-48
Rothschild 4.5-5X48-50
Robusto 4.5-5.5X50-56

(yes, I know there's overlap)

As I said, it doesn't really matter, but, just for conversation purposes.

Peace of the Lord be with you.