The 2004 Ford F-150 wiper blade sizes are 20" wiper blades on both sides front. See Sources and Related Links below for more information. Since there are over 22 different wiper arm attachments, do not buy wipers just by length only - be sure to lookup exact wiper blade part numbers by vehicle make, model and year for the brand wiper you decide to purchase. This ensures correct length AND correct attachment.
Wiper Blade Sizes: 24" Drivers Side, 20" Passenger Side and 16" Rear
The 2002-2004 Ford Explorer (except sport) takes 22" replacement wiper blades on both sides front and a 16" rear. The Sport takes 18" both sides front and a 14" rear.
The 2004 Chevrolet Silverado takes 22" replacement windshield wiper blades on both sides front.
It's a 20 in. wiper blade
The 1998 Ford Ranger takes 18" replacement windshield wiper blades on both sides front.
For a 1999 Ford Taurus the driver side wiper blade is a size 24. The wiper blade on the passenger side is a size 20.
The 2005 Ford Explorer takes 20" replacement wiper blades on both sides front and a 16" rear.
19" Front9" Rear
All 2004 Dodge Dakotas take 21" replacement windshield wiper blades on both sides front.
The 1997 Ford F-Series Pickup takes 22" replacement wiper blades on both sides front.
The 1991-2002 Ford Escort takes 20" drivers side and 18" passenger side replacement windshield wiper blades on the front and if applicable, a 14" rear wiper blade.
The 1996 Ford Windstar takes 24" drivers side, 20" passenger side and 16" rear replacement windshield wiper blades.