To be absolutely certain, I recommend:
* Checking your owner's manual: This is the most reliable source.
* Looking at the existing wiper blades: The size is usually printed on the blade itself.
* Using an online wiper blade finder: Several websites allow you to enter your vehicle's year, make, and model to determine the correct size. Be sure to use a reputable source.
Don't rely solely on this answer. Confirm the size before purchasing new wipers.