Hunter Pet Sizes?

Greetings all. Returning Horde hunter player here.

I've stopped playing WoW for quite a while now and the last expansion I played was Wrath of The Lich King. I'm now coming back to the game and I'll be playing Cataclysm. It seems that there have been a lot of changes to the hunter from LK to Cata.

While I've managed to work out most of the changes, there is still one bugging me: Pet size. Back in LK, I think that the hunter pets didn't grow bigger even as they leveled (not sure, correct me if I'm wrong in this one please). Do they grow bigger in Cata?

My apologies if this seems like an irrelevant topic but I'm the type of player that gets distracted by small things like this in-game.