I left this vague on purpose for the time being because normally a hex-tile map would have scales in the miles. On golf borg specific hex courses I guess the scale would be 10ft per tile, but there isn't any reason you couldn't use this same system on a local square-tile dungeon map with 5ft squares.
At some point I want to figure out optional rules for ricochet mechanics so you could play putt-putt golf in a dark dungeon by torch-light.
EDIT:
OH if you mean the scale in regards to how far it travels, for each 1 on the distance die the ball travels the equivalent of 1 tile