What size are the front speakers in a 1986 jetta?
the front speakers are 4"x6"
the rear speakers are 3-1/2"
The front speakers are 4.75" (yes, a non-standard size) and the rears are 7.0" (you guessed it, another non-standard size). 4.5" aftermarket speakers will fit the front with some additional foam baffling round them to make them air-tight and 5.25" and 6.5" speakers will fit the rear with a Scosche adapter bracket.