How Colombia Grades Its Coffee Beans by Size

If you've ever bought Colombian coffee labeled 'Supremo' expecting the best cup, you might have been misled. In Colombia, the way coffee beans are graded isn't about taste, processing method, or altitude — it's about their physical size. That raises an important question for specialty coffee drinkers: can a larger bean really mean better coffee? The short answer is no, and here's what you need to know.

Colombian coffee is graded primarily by bean size. A bean is classified as Supremo if it's 18 mesh or larger, while beans under 18 mesh are graded as Excelso. That’s the whole system — no tasting scores, no altitude limits, just a simple physical measurement.

What Does 'Supremo' and 'Excelso' Actually Mean?

In Colombia’s official coffee grading system, 'Supremo' refers to coffee beans that are 18 mesh or larger. 'Excelso' beans are smaller than 18 mesh. Mesh here refers to the number of holes per inch on a screen used to sort beans. One mesh equals 1/64 of an inch, so 18 mesh works out to approximately 7 millimeters in diameter — the minimum size for a Supremo classification.

Why Bean Size Doesn’t Equal Cup Quality

Bean size is often wrongly assumed to correlate directly with quality. In specialty coffee, cup quality depends more on factors like altitude, processing method, variety, and post-harvest handling. In Colombia, however, size-based grading means that a Supremo bean could come from any region, any farm, and be processed in any way — and still earn the 'Supremo' label solely due to its diameter.

Most Commercial Colombian Coffee Comes Without Origin Info

Colombian coffee that lacks detailed labeling — such as specific farm, region, or processing details — is typically commercial-grade and sourced from the central MAM (Medellín, Armenia, and Manizales) region. These beans are usually exported as Excelso or Supremo without further differentiation. On the other hand, premium lots from renowned regions like Huila often specify the estate, varietal, and altitude, offering much more transparency for the buyer.

The Science Behind Coffee Bean Sizing

Coffee bean sizing is done using standardized screens with numbered mesh sizes. Each number corresponds to the number of holes per linear inch. For example:

• 18 mesh = ~7 mm diameter (minimum for Supremo)
• Below 18 mesh = Excelso

This mesh system is common in Latin American coffee producing countries, though specialty markets may prioritize other metrics like density, screen size in millimeters, or harvest altitude.

Frequently Asked Questions

Does 'Supremo' mean high-quality coffee?

No. In Colombia, 'Supremo' only means the coffee beans are 18 mesh (around 7 mm) or larger. It does not indicate flavor profile, processing method, altitude, or cup quality. Many Supremo beans are commercial grade.

What does 'Excelso' mean in Colombian coffee?

Excelso is the classification for Colombian coffee beans that are smaller than 18 mesh, which is roughly under 7 mm in diameter. It's a lower size grade than Supremo but doesn't necessarily mean poorer quality.

Why does Colombia grade coffee by size instead of taste?

Colombia’s traditional coffee grading system uses bean size as the primary criterion for classification. This approach is simple and based on physical traits, but it doesn’t account for flavor, altitude, or processing quality, which are more relevant to specialty coffee.

Where does the best Colombian coffee come from?

The best Colombian coffee often comes from regions like Huila, especially at elevations above 1500 meters. These regions frequently provide detailed information about farm origin, varietal, and processing, unlike generic Supremo or Excelso beans.

Is 18 mesh the only measure for Supremo coffee?

Yes. According to Colombia’s system, any coffee bean that measures 18 mesh (approximately 7 mm in diameter) or larger qualifies as Supremo. Beans smaller than that are classified as Excelso.

Should I buy Supremo coffee for better flavor?

Not necessarily. Supremo refers only to bean size, not flavor. For better flavor, look for Colombian coffees that list specific origins, farms, or processing methods — especially those from high-altitude regions like Huila.

Recommended FrontStreet Beans from Colombia

For a taste of Colombia’s finest, try FrontStreet Coffee’s FrontStreet Huila — a medium roast featuring the Caturra variety, washed process, and notes of chocolate, hazelnut, and caramel. It delivers a balanced acidity and sweetness ideal for filter brewing. Another great option is the fruity and juicy FrontStreet Sidra and FrontStreet Elephant Bean, both medium roasts celebrated for their vibrant floral and citrus profiles, perfect for pour-over or espresso. These beans highlight Colombia’s potential beyond size-based grades. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.