Din?

[68amc]

What exactly is DIN? I hear double din and single din. I have no clue what that is.

 

[1996xlt]

I don't normally trust wiki, but: http://en.wikipedia.org/wiki/ISO_7736

And this is straight from www.crutchfield.com:
The great majority of vehicles have a 2" tall (or "DIN-size") stereo; some Chrysler and GM stereos are 3" tall (DIN-and-a-half), and some Japanese vehicles have 4" tall stereos (double-DIN). Many vendors make 3" and 4" tall aftermarket stereos, or you can purchase mounting kits that allow you to mount a standard (DIN-size) stereo in these larger dash openings.