The size of speakers in a Ford Ranger depends on the generation. The Ford Ranger was produced by Ford Motor Company from 1983 until 2011.
The first generation, produced from 1983 to 1988, has speaker sizes from 4 inches in the dash, 6 x 8 inches in the front door, 5 x 7 inches behind the rear seat and rear-seat side panels of 6 x 8 inches. Second generation, produced from 1989 to 1992, has front-door 6.5-inch speakers, kick panel 6.5- to 6.75-inch speakers, and the behind-seat speakers are 4 inches.
The third generation, produced from 1993 to 1997, has front door 6 x 8-inch speakers, kick panel 6.5 inch and behind rear seat of 5 x 7 inches. The fourth generation, produced from 1998 to 2011, has front door 6 x 8-inch speakers, kick panel 6.5-inch speakers and behind rear-seat speakers are 5 x 7inches. These speaker sizes may vary depending on premium audio options and cab type.