I think 1 hex = 4 feet scale, the 10 yards to a hex, and the 5 miles to a hex are the most practical scales.
Incidentally, Wintertree Software has a new hex font called EasyHex, released just minutes before Christmas Day. This font enables you to make hex grids in any major word processor or photo editor. I find it very useful to make my maps.
You can purchase EasyHex from this site:
https://www.drivethrurpg.com/product...x-utility-font