2008 Madza 3 Size of speakers in the doors?

I just got a 2008 Madza  3 I Touring Sadan and I am thinking of replacing the factory spreakers in the front and back doors. What is the size of the speakers on the front and back doors? Will it be easy to wire them in or should I have a shop do it? I never replace factory speakers with aftermarket 1s. I know that most stock speakers have wiring harnesses.

OK I got tired of waiting for someone here to give the info, So I had to find out myself.... You would be best off going with 6.5 inch Component speakers and 1 inch Tweeter for the front door. And for the rear doors you would want to go with 5x8. I hope this helps someone

see though i find the speakers in the car already sound reallly good. i mean 4 of those sound awesome. they sound better then my friends car and he has 2 subs and 4 aftermarket speakers

go with component speakers.
altho i dont think the stock deck has enough power to run component's properly, so an amp will really help.
 
and round speakers will always sound better than oval shaped speakers.