The way to measure your grind is by "clicks" away from all the way tight. You'll feel the nut click as you unscrew, so count the number of clicks. The number of clicks to unscrew should vary based on the brew method you're using. Here's the general guide I use:

Type Number of Clicks Standard Drip Brew 10 clicks #2 Pour over 10 clicks Aeropress 6-8 clicks Espresso 5 clicks French Press 12-14 clicks Moka pot 9 clicks Chemex 9 clicks

Also if you're looking for the more vague ones:

Type Number of Clicks Medium fine 8 clicks Medium 10 clicks Medium coarse 12 clicks

credit to u/Iwannayoyo for the vague ones