Thats not my car. its just something that popped up google and happens to be an official pic from Rays, the manufacturer. Its even on the product page:
RAYS - The concept is racing. [en]
Guessing its a 19 given the way the brakes sit in it. Pretty average fitment, the most aggressive is 19x10.5 +12 which is what i would run in the front.
19x9.5 +25 and 19x10.5 +12 would be super easy fitment, no work required. Not nearly aggressive enough for me