Crutchfield.com says 6.5
Inorder to remove to the front speakers u have to remove the door panel, which is a little pain in ass. So I just removed all the screws on the door panel - I believe there are 4 screws- Two in the lower corners- one on the side and one in middle (off the top of my head). With all the screws out I unclipped the panel from the door- starting from the bottom. The panel is still attachted to the door on top- where it meets the window. I just left it attchted on top and swung the panel up to have access to the speaker. The speaker is just attcahed by 3 screws. It's a tight fit but I found it easier then trying to remove the entire panel.
Good luck
Esti