I'm looking to run a campaign in Greyhawk, but I'm not sure of the actual size of the place. I have found several maps online, but not one map has a scale of any kind that I can see. I know I've seen one with it before. I believe it's this map in the lower right corner, but that one is much too small to see.
I'm aware that for my own campaign I can make 1 hex be any size I want it to be. It could be 20 miles, 30 miles, or 50 or 100 or more and it doesn't really matter. My question is what the official answer is, because I may wish to use a published module at some point. Even knowing something basic like the distance in miles between Dyvers and Greyhawk, or Dyvers and Verbobonc would be useful information. Heck, even knowing something general like the travel time between Greyhawk and Dyvers would be useful, because you can infer a lot from that. I know I've read places where they speak of the distances between locations before. I want to say Verbobonc and the infamous Village of Homlett, but I am not sure where I read that anymore.