What is the grind size for a traditional double Lungo shot?

The grind size for a traditional double Lungo shot is most accurately represented by the range of 14-20g of coffee. This choice is indicative of the typical coffee dose used for a Lungo, which is a longer espresso shot. A traditional double Lungo generally requires a higher coffee dosage compared to a regular espresso shot.

Using 14 grams aligns with the amount needed for a shot that will extract longer, producing the unique flavor profile associated with Lungo shots. A longer extraction time requires a coarser grind compared to regular espresso, optimizing the solubility of the coffee compounds while preventing over-extraction.

Grind size is crucial in preparing espresso because it affects extraction time and flavor. The other choices either do not accurately capture the coffee weight necessary for the Lungo shot or do not represent the standard measure typically used in barista practices.