Center caps are sized by the model number of the original center cap, by the dimensions of the wheel or by the dimensions of the original center cap. Original center caps cannot be replaced with different models if they're shaped like a plate or starfish or if they use screws.
Replacement wheel center caps are suitable for every wheel regardless of the car or tire brand. Different designs and styles are available once the proper cap size is determined. This ability provides more options for customization by not requiring the buyer to follow the manufacturer's original wheel center cap design.