* Check your owner's manual: This is the most reliable source. The manual will specify the correct sizes.
* Look at the existing wiper blades: The size is usually printed on the blade itself.
* Use an online parts lookup: Websites like AutoZone, Advance Auto Parts, or Napa Auto Parts allow you to enter your vehicle's year, make, and model to find the correct wiper blades.
Don't rely on generic size information found online without verifying it with one of the methods above, as different trim levels may have different wiper arm lengths.