Ok so my girl is tired of her mach system in her car cause the CD player skips and its all around a POS system...i think has been said over a bajillion times.

well she wants to replace it so I was wondering what was the size of the speakers all around? I think theres just rears, door speakers and the door tweeters right? Looking to just re-do it all with the extra Alpine cd player I have here. THANKS