How Fine Should Pour-Over Coffee Be Ground? How Does Grind Size Affect Coffee Flavor?

Finding the Perfect Coffee Grind for Optimal Extraction

FrontStreet Coffee's topic today: how fine should coffee grounds be for perfect extraction?

Grinding is the first step of manual brewing — and also where many people go wrong. Grind too fine or too coarse, and the taste of the finished cup shifts dramatically. If you want precise control over coarseness, use a burr grinder with clear adjustment, such as the Little Eagle or Little Pony grinders, which let you dial in an exact setting for the fineness you want.

Using Little Pony Grinder Settings as a Reference

The ideal coarseness for pour-over coffee falls between espresso (settings 1-2) and French press (settings 5-6) — in other words, around setting 4, with smaller numbers meaning finer grounds.

If you use a traditional hand grinder, aim for particles roughly half the size of brown sugar crystals. Hand grinders do have a drawback, though: they tend to produce uneven particle sizes. So how exactly do coarse and fine grinding change the flavor?

Grounds that are too fine cause over-extraction, pulling undesirable impurities out alongside the good compounds. Grounds that are too coarse cause under-extraction, leaving the cup weak and hollow.

FrontStreet Coffee Recommendation

Grind size depends on your brewer, and for immersion brewing like a French press, FrontStreet Coffee recommends a coarse, granulated-sugar grind — setting 10.5 on an EK43s electric grinder, or 26 clicks on a hand grinder, resembling small gravel rather than fine sand. Too fine a grind lets fines slip through the metal mesh and leaves a muddy sediment at the bottom of the cup.

If you like fragrant, floral cups, try FrontStreet "Strawberry Candy" — a Geisha blend of Costa Rican honey process and Panama washed Geisha. In a French press it releases rose, citrus, grape, and dried blueberry aromas, and with milk it turns into something like strawberry gummy candy. For a low-acid black coffee with rich body and oils, choose FrontStreet PWN Golden Mandheling — sorted three times by hand plus once by machine, roasted medium-dark, with dense spice, caramel, cedar, and dark chocolate notes and a mellow, full mouthfeel.