The speakers in the doors of a 1991 Ford Ranger are 6-inch speakers.
i have a 2001 ranger xlt and my door speakers are 6 X 8
The speakers are probably 6" X 8".
6x8/5x7
5x8
6 inch by 8inch
if it is a extended cab all 4 four speakers are 6X8
You can use 5x7 or 6x9
I'm pretty sure they're all 5x7s
Depending on what year model 1990-1999 is either 6x8 (5x7 is the same thing) or 6.5". The 1996 Ford Ranger XLT model the front and rear speakers are 6x8(5x7).
6X8 most speakers are 6X9, pioneer makes a factory replacement for Ford/Mazda that is 6X8
the doors are 5 inches and the back ones are 4 inches