There is no single perfect "grind" for any brewing methods. If there was, the range and purpose of coffee grinders would be pretty much unsettled.

Every espresso machine has its own specifications and conditions depending on the way you like to brew your coffee. As you tweak your grind, some general rules are that if your coffee tastes weak you may need to grind finer. If the coffee tastes bitter, experiment with a slightly coarser grind. Taking this into consideration, here are some of suggestions to provide you with to a little more knowledge and help you to get started so you can flavor the best cup of coffee according to your taste.

Just as roasters will disagree about how dark a particular coffee roast should be, some will disagree with how fine it should be. However we offer you the choice of mixing and matching your roast with your grind.

Course Grind:
As the name implies, the resulting grinds are comparatively large, with each chunk of bean particle having the approximate size of a particle of heavy-grained kosher salt, downright chunky. (This grind is appropriate for percolators, French presses, used in Drip Machines)

Medium Grind:
Is most commonly known as a "general purpose grind" it got its name because this is the most common grind provided by supermarkets. The size of the granules resembles the evenness of table salt. (This grind is appropriate for your common household coffee maker and vacuum brewed coffee.)

Fine Grind:
The starting point for an espresso grind, where the granular particles are closer to the size of sugar, but not quite powdered the grains should still be discernable to the touch. When coffee is grinded this fine, a number of factors come into play. You've uncovered generally the face of the coffee and when brewing water can get in touch with all its flavor, excellent for an original taste in espresso. But by grinding this fine, you've improved the resistance of the water passage. (This grind is appropriate for espresso machines deliver you a rich and tasty beverage.)

Turkish Grind:
This is the finest of all grinds, and resembles powder sugar or cinnamon. Turkish coffee is a very demanding brewing method, Turkish grind is the most challenging grind you can ask for from a grinder, it is very difficult to produce, but some can. (Used with Ibrik Machines)

Good luck and happy grinding!!!