to be honest, any 7th gen civic looks the best with 18" rims. 17" is the lowest I would go if you are looking for a good look. 16" rims on 7th gens just look too small proportionally. The reason why 18" rims on 7th gen civics look the best are cuz the stock wheels that come with the civics are larger than stock wheels on 6th gen civics, so naturally the wheel wells are larger. Typically people get 17" wheels for 6th gen civics, so for 7th gens the equivelent would be to get 18".

Only drawback to getting 18" wheels is the price is a bit more costly. So if you are out looking to save a lil bit of money, then go with 17" rims.

If you want more performance, then yeah, maybe 16" are the way to go...but in all honesty, we drive civics, so it's not like you are getting THAT much more power by having smaller wheels.