I almost forgot to tell you guys until this thread popped up again...
I was in WalMart* the other day and actually saw that they carried a Lodge dutch oven. I'm not into the dutch oven thing, but remembering this conversation and I looked at it a little closer. It was 12" and, if memory serves, it was rated for 7 quarts. So I would assume that a "#12 standard height" refers to a 7 quart oven.
Just thought you guys would like to know. <img src="images/graemlins/smile.gif" alt="" />
*This one was in Simpsonville, SC... just south of Greenville.