4x6" speakers in the front door, 6x9" in the rear.
Adapters exist that will allow you to mount a 5 1/4" speaker, or some 6 1/2" speakers, in the front doors: http://www.amazon.com/Metra-82-3300-Stereo-Speaker-Adapters/dp/B0007WRQHQ
When installing the rear speakers, you'll need to retain the factory mounting brackets, and you may need to cut or bend out the rear deck metal to fit the new speaker basket.
