The size of front speakers on a 94 Mazda 121 are 130mm.
the 94-01 dodge ram pick-ups have 6x9 speakers in the doors and 5 1/2 in the back
6.5" round speakers in the front and back.
6.5" all four speakers
I found this site while looking for speakers for my '94 Taurus. Put in your make, model, and year; it will give you a wide selection of speakers and what size you need.See "Related Links" below
6 3/4
Look on the end of the dash board, just inside the driver side door.
You have to remove the door panel. Then it's pretty much self-explanatory.
6.5 in the back
how do I remove rear speaker in rear door 94 astro van rear door will not open
my 1990 has 4" speakers hole in the back but i have 5" speakers in there now.
Small screwsriver pop the metal speaker covers off..easy access to speakers from there