Astra mk5 speakers?

Question

hi.i have astra mk5 2004.i am looking to replace the car speakers for a better ones.but.. i am rubish at sound systems... what are the sizes for the door(front and back) ,mirror sizes etc ect?how do i know which ones tobuy from e-bay?thank you for your help

Answer 1

Fronts are commonly 5 1/4" (13cm) and rears are either the same, or 4" (10cm)

Answer 2

Crutchfield.com for the speaker sizes.

http://www.crutchfield.com/cgi-bin/autoi...

and JC Whitney for the parts

http://www.jcwhitney.com/Auto-Parts/1010...

These will give you an idea because they let you pick your vehicle.  And supply the right parts.