Four inches and that will be a tight fit.  Make sure that you don't get a pair that "rise" too far from the door either, you've only got about 2 cm of space between the door and the dash.

MT

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of J Stewart
Sent: Sunday, August 15, 2010 7:51 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Door Speaker Size- Stock

OK, I searched the archives a dozen different ways and couldn't find the info. What is the size of the stock speaker opening on the front doors? A DPO of my '85 installed new speakers that prevent the window cranks from rolling the windows down. TIA, Jeff

Jeff Stewart