When hubcaps were first introduced in the early 1900s, they were made to fit a range of wheel sizes. Today, however, most hubcaps are made to fit a specific wheel size. To find out what size hubcap you need, measure the diameter of your wheel and then consult a Hubcap Size Chart.
To accurately measure the diameter of your wheel, you will need to remove it from the car and place it on a flat surface. Use a tape measure or ruler to measure the distance across the center of the wheel from one side to the other. This measurement should be taken at the point where the tire meets the rim. Once you have this measurement, refer to a Hubcap Size Chart to find out which size hubcap you need.
If you're unsure about what size chart to use, or if your measurements aren't listed on any of the charts available, you can always contact a local tire or auto parts store for assistance.