Our coffee is freshly ground to a fine-to-medium grind. We recommend buying our ground coffee first - Star Eco Coffee - so that you get to use your Pod Star capsules right away, or buy a Pod Star grinder when you get your Pod Star capsules so that you can grind any coffee beans you like. Remember, too coarse and the water will flow too quickly through the pod, too fine and it will flow too slowly. Coffee sold as 'Espresso' grind, which is most of the ground coffee sold in supermarkets and cafes is too fine for a capsule machine. Espresso Grind is designed for an Espresso Machine, not a Pod Machine,Customers have also had a lot of success with coffee bought ground to a "Stove Top" grind. On a good cafe grinder, the perfect setting is 2.4