look like 4 threads up, an entire thread of civic pics, you can tell size in general just from looking at them
or check tirerack and change sizes, that will give you a good indication of them as well

there are tons and tons and tons of threads about wheel size, do a little searching and you will see that 15-16 is the best size, some go for 17 for looks but not handling, and some like 14 to save weight like stock hx wheels, or even 13's like vx's