I am no expert. But different selling markets have different offset as they do not have specific set of wheels to sell along with the vehicle.
But anything from 35mm to 45mm would be fine. Try to see the offset value written on your stock wheel. If you are going for a bigger tire, max opt for an offset of 45 otherwise it will look damn ugly (as it will be outside of the fender area) and also rub the fender well on turns.
The 2004 Honda Civic has a 8 ft. 7.1 in. (103.1 in.) wheel base.
The 2004 Honda Civic has front wheel drive.
The 2004 Honda Civic has 16 valves.
The 2004 Honda Civic is a gas-powered vehicle.
The 2004 Honda Civic has an inline 4 engine.
The 2004 Honda Civic has a 5-speed manual.
There is no carburetor on a 2004 Honda Civic. It will be fuel injection.
The 2004 Honda Civic has single overhead cam (SOHC).
The height of the 2004 Honda Civic is 4 ft. 8.7 in. (56.7 in.).
replace air filter on a 2004 Honda civic
The curb weight of the 2004 Honda Civic is 2449 lbs..
The 2004 Honda Civic is 14 ft. 7.4 in. (175.4 in.) long.