Extra Coarse Grind
As large as you can go on most popular conical burr grinders – similar to ground peppercorns. Is an ideal cold brew grind size or for cowboy coffee, such as would be made over a campfire or in a pot over the stove if your coffeemaker has broken.
Medium Grind
Medium grind is the standard for grocery store pre-ground coffee and is the best grind for drip coffee. This coffee has little cling and is tidy to scoop and add to your drip filter. It has the consistency and size of dry sand. While many of us are comfortable with medium grind drip coffee, there are specialty coffee brewing setups that can produce a delicious cup of coffee from a medium or medium fine coffee grind.
Finely Ground Coffee
Finely ground coffee has little to no sheen and will hold your finger indentations if you press it. This grind is generally used for espresso and Moka pots. When preparing fine grind coffee, be sure to work in short pulses. You want to give your burr grinder the chance to manually process all surfaces of the coffee. If you leave the grinder on to chew away at it, the grinding process becomes a battering process. Espresso grind size results in clumpy grounds. The moisture left over from the roasting process gets blended down into the coffee, rather than shining on the surface as it does on coarse ground coffee.