11 or 12 inch rotors?

well my car is not here, and when i went to pick up the parts i need I got the question "11 or 12 inch?" needless to say im kind of stuck because i dont know whats on the car, and i dont know if i can put any size on it. Its a 98 with the bigger shiny factory wheels (15's I think)...Do i have to measure or can I cheap out with the 11's?

You need to know, the different rotors sizes use a different caliper bracket. If you have the factory chrome wheels they are 16" wheels and you have the 12" rotors, at least that is what I have.

Pop the trunk open and look on the trunk lid for a stick with a bunch of 3 digit codes, this is your RPO code label.

JA9- Heavy Duty Brakes (12 inchers)

JB9- Light Duty Brakes (11 inchers)

All Intrigues came with 16 inch wheels of some sort, so that makes no difference in what you have. Only the codes. Unless of course someone modified your car before you got a hold of it:)