For a variety of reasons, I've been thinking about 6 Mile Hexes. Not that I run a hexcrawl, but still, it's useful metric to keep in mind when thinking about PCs and NPC carving out kingdoms.
I decided to put together some links that I've found useful concerning them.
In Praise of the 6 Mile Hex
How Much Adventure in One 6 Mile Hex?
So Hex Size in Square Miles (about 32 miles)
The AD&D DMG discusses setting up a stronghold by clearing an area, and discussed 20-40 mile hexes (p. 47) and even 200 yard hexes for small-scale mapping (p. 93).
What other links should I add for discussions of the basic structure of a six-mile hex for domains or exploration?