Are the original speakers in the front doors of my '96 Accord LX 5-1/4" or 6-1/2"? I want to replace them and want to know what I should put back in the place of those factory speakers. If I buy 5-1/4", do I need some kind of adaptor for the speakers?

It looks like there are Pioneer speakers in the back, and I'm not sure if they are factory speakers or not. What size would I need for the back as well?

Thanks for any help as always,

Barry