With all the detailed measurements available on wheels, you'd think there would be some fitment or sizing system for the center caps???!!
Personally, I just hate being rippped off. A plastic center cap is probably a 50 cent item to make, yet they charge $20-40 each. Example, the center caps on my wife's Jaguar are cheap plastic and the tabs routinely break off no matter how careful you are when rotating or rebalancing the tires. They cost$40!! For that money, I'd like an Aluminum replacement part at least.
Notice how center caps never last more than an hour or two in the parts for sale site. Wheel experts, please chime in!!