Front and rear speaker size in 2002 dodge ram quad cab?

Depending on your trim level.... 1in center and 2-3.5s in dash w/infinity factory... Standard 6x9 in front doors, and 5.25 in rear door.. We install alot of infinity 6x9s and infinity 6.5 in these.. You can fit 6.5s in the rear if you drill new screw holes.