Hi,
I agree with everyone who said models should be tall. IMO, clothes look much better on them, regardless how graceful a shorter one might be, a tall model is always a better option

Again, graceful short people who are a dream are ballerinas

And those are the only ones I would refer to as "petite", the rest are plainly short.
I don't know where to put everyone in between... flying assistants, maybe? (just talking regarding their height, nothing to do with their brains and/or talents)
My favourite model at the moment is Karlie Kloss, and I wish I would know more about L'Wren Scott (I know she's a stylist now). I used to love Eva Herzigova and Shalom Harlow (both 1'80 cm - 5'11''), but something is telling me they are almost short for the standards of this thread