hondaon18's

okay i just purchased some rota d2 rims royal red. i am wonder what stock honda center cap would fit on the rota rims. i measured the center cap of the rota and it measures 2.50 inches. i tried to put my civic si center cap on it but it only measures 2.25 inches. and my buddies honda accord center cap measures 2.75 inches . so im wonders if any body knows what center cap will fit?