does anyone know what is the speaker size for the 05 civic

On my 01 EX it has 6.5s in the front and 6x9s in the rear. I would imagine its the same on yours as long as it is an EX.

Hey bents,
I have an 03 LX Sedan and the speakers are also 6.5 (all 4) In fact I just bought some Fosgate's at Best Buy for $107/pair. They are a 2 way speaker. For the front I bought some Pioneer 4 Way's on sale for $79. Everything is on sale there right now. I also bought an amp to run all four speakers and keep the stock head unit.

Anyway, yeah, I'm sure your 05 has 6.5's all the way around.

Which model Civic did you get?