How to Identify Wiper Blade Sizes?

[Andres]

Here are the sizes of wiper blades: 1. 14 inches = 350mm. 2. 15 inches = 375mm. 3. 16 inches = 400mm. 4. 17 inches = 425mm. 5. 18 inches = 450mm. 6. 19 inches = 475mm. 7. 20 inches = 500mm. 8. 21 inches = 525mm. 9. 22 inches = 550mm. 10. 24 inches = 600mm. 11. 26 inches = 650mm. Here is some information about wiper blades: 1. The power source of the wiper blade comes from an electric motor, which is the core of the entire wiper system. The quality requirements for the wiper motor are quite high. It uses a DC permanent magnet motor, and the wiper motor installed on the front windshield is usually integrated with the worm gear mechanical part. The function of the worm gear mechanism is to reduce speed and increase torque. Its output shaft drives a four-bar linkage mechanism, which converts continuous rotational motion into a left-right swinging motion. 2. The wiper motor adopts a 3-brush structure to facilitate speed change. The intermittent time is controlled by an intermittent relay, utilizing the motor's return switch contacts and the charging-discharging function of the relay's resistor-capacitor to make the wiper blade sweep at a certain cycle. The wiper blade's rubber strip is the tool that directly removes rainwater and dirt from the glass. The rubber strip is pressed against the glass surface by a spring strip, and its lip must match the angle of the glass to achieve the required performance.

[JuliaAnn]

I'm the kind of person who often changes car parts myself, and figuring out wiper blade sizes is actually quite simple—just measure the rubber blade length with a ruler. I usually measure from one end of the blade to the other, using either centimeters or inches, with 15 to 28 inches being the most common range. Make sure to measure straight without bending the blade, or you'll get an inaccurate reading. A blade that's too large might scrape the car frame, while one that's too small will miss raindrops, especially during winter ice buildup. Last time I replaced mine with the wrong size, the noise was terrible, but after getting the correct measurement, it became much quieter. Over years of driving, wiper blades can shrink due to aging, so I check the size quarterly to maintain optimal clearing performance. This saves money and ensures driving safety—especially during heavy rain when clear visibility is crucial. Never underestimate this little component.