What size rear door speakers for a 2000 Camry Wagon?

[Pesca]

Hi all,

I'm looking to replace the speakers on my wife's 2000 Camry Wagon  (XV20) and from looking on a couple sites online it says the front speakers are 6 1/2 " but the only reference to the rear speaker size is for a sedan (6x9). I can't seem to find anything that mentions the size of the rear door speakers for a  wagon. I'm assuming they're a bit smaller than the fronts just going by the door grille. 

Just curious if anyone here with a Camry wagon from this gen  knows the correct  size for the rear door speakers?

Thanks :)