How Colombia Grades Its Coffee Beans by Size

When you're hunting for great Colombian coffee, you might see bags labeled 'Supremo' and assume you’re getting premium quality. But here’s the twist: in Colombia, that label says nothing about taste. The country’s coffee grading system is based entirely on bean size, not flavor profile, processing method, or origin. That means a Supremo bean could still be a commercial-grade cup, unless it comes from a known single-origin farm.

Colombia grades its coffee beans primarily by diameter—nothing more. A 'Supremo' bean is simply larger than an 'Excelso,' and that’s the main difference. Size does not equal cup quality. If you want great-tasting Colombian coffee, look for beans that name a specific farm, region, or processing method.

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

In Colombia’s coffee classification, the terms 'Supremo' and 'Excelso' refer only to the physical size of the green coffee beans. These grades do not indicate altitude, processing style, or flavor characteristics. They are purely physical classifications based on the bean’s diameter, measured in units called 'mesh' or ' (mù)' in Chinese, which translates to 'mesh count' or 'screen size' in English specialty coffee terms.

How Bean Size Is Measured in Colombia

The Colombian coffee grading system measures bean size using a mesh system where one '' equals 1/64 of an inch. To convert, 1 inch equals 25.4 millimeters, so:

• 18 (mesh) = approximately 7.0 millimeters in diameter

Here’s the breakdown:

• Supremo: Coffee beans that are 18 and larger. This is the largest commercial grade used in Colombia.
• Excelso: Coffee beans smaller than 18 but still within a range that allows them to pass through an 18 screen while mostly being retained on a 15 screen. (Note: While not explicitly stated in the source, Excelso is widely understood in global trade to include beans that can pass 15–18 mesh.)

These measurements are taken by passing beans through standardized screens with specific hole sizes. The larger the mesh number, the smaller the holes—and the smaller the beans that can pass through.

Why Size-Based Grading Doesn’t Equal Quality

In much of the specialty coffee world, quality is determined by factors like altitude, processing method, cupping score, and traceability to a specific farm or cooperative. In Colombia, however, the official grading system does not incorporate these elements. A Supremo bean could come from a low-altitude farm with poor processing and still earn the top size-based grade. Conversely, a small but densely flavored Excelso bean grown at high elevation with careful processing might cup far better—but wouldn’t qualify as Supremo due to size alone.

This means that if you’re buying Colombian coffee simply because it’s labeled 'Supremo,' you’re not guaranteed a great-tasting cup. In fact, most high-quality, traceable Colombian coffees from well-known regions or farms will specify the origin, farm name, or processing details on the bag—rather than relying on size grades alone.

Coffee from Colombia’s key growing regions—like Huila, Antioquia, or Nariño—will often highlight their specific terroir, varietals, and processing on the package. If your bag of Colombian coffee lacks those details, it’s likely a commercial-grade blend from the MAM (Medellín, Armenia, Manizales) region, which is the source of much non-specialty, size-graded coffee.

Frequently Asked Questions

What does 'Supremo' mean in Colombian coffee?

In Colombia, 'Supremo' refers to coffee beans that are 18 mesh or larger in size, which is about 7.0 mm in diameter. It is the largest standard commercial grade based on bean size, but does not indicate flavor, processing method, or origin.

What is the meaning of 'Excelso' coffee?

'Excelso' coffee beans in Colombia are smaller than Supremo, meaning they do not meet the 18 mesh size requirement. They typically pass through an 18 mesh screen but are retained on a finer screen (commonly 15 mesh), indicating a smaller bean size. Like Supremo, Excelso is a size grade, not a quality indicator.

Does 'Supremo' mean better-tasting coffee?

No, 'Supremo' does not mean better taste. It only means the beans are larger in size (18 mesh or above). Taste depends on factors like origin, altitude, processing, and roast level—not bean size.

How is coffee bean size measured in Colombia?

Colombia measures coffee bean size using a mesh system where 1 equals 1/64 of an inch. An 18 bean is about 7.0 mm in diameter. Supremo beans are 18 and larger; Excelso beans are smaller than 18 .

Is all Colombian coffee graded as Supremo or Excelso?

No. These are just two of the commercial size grades. Many high-quality, single-origin Colombian coffees do not use these labels at all, instead specifying farm, region, or processing details. Lower-grade or commercial blends may lack origin info and rely only on size grades.

Where does most non-specialty Colombian coffee come from?

Most non-specialty, size-graded Colombian coffee comes from the MAM region—comprising Medellín, Armenia, and Manizales. These beans are often commercial-grade and lack detailed origin labeling.

Top FrontStreet Beans for Exploring Colombian Origins

For drinkers curious about real Colombian flavor beyond size grades, try FrontStreet’s Huila Single Origin—bright and citrusy with notes of blackberry and caramel. Their Antioquia Washed offers a balanced profile with almond and milk chocolate. For something deeper, the Nariño lot brings ripe stone fruit and a velvety mouthfeel. All three highlight actual farms and processes, not just bean size. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.