What Are S16 S18 Coffee Size?

Vietnamese Coffee Exporter

What are S16 S18 Coffee Size? Many countries throughout the world use the floor classification technique to compare different types of beans in terms of bean size when it comes to green coffee classification by floor beans.

This grading system is based on the premise that coffee beans cultivated in higher elevations yield larger and denser beans than those grown in lower elevations. Additionally, coffee plants grown at higher elevations generate beans of superior quality. As a result, there is a link between the size of the beans and their density and quality.

However, there are numerous exceptions to this relationship; for example, there are coffee beans that are very large but of poor quality, and vice versa, there are beans that appear little but have excellent and unexpected flavor attributes when roasted. As a result, this classification of floor beans should only be used to determine whether a batch of green coffee beans is uniform in size, and thus serves as a foundation for roasting and analyzing coffee bean uniformity. The roasted coffee beans’ color and size.


There was also a line of Robusta coffee beans with floor 20 beans on the market in Vietnam, which meant they were quite large, but the quality was not greater than Robusta beans with floor 16-18, especially, in terms of aroma and physicality. This shows that there are some exceptions to the generally favorable association between bean size and coffee quality, taste, and quality.

In determining the size of green coffee beans, each coffee-growing location or country has its own terminology or jargon. However, floor beans are the most often used index for determining the size of green coffee beans around the world. The most common floor kinds are 17/18, 15/16, and 13/14...

The above metric’s definition is its ratio in 64ths of an inch. The unit of measurement mm is 7.1mm, and the floor 18 indicates 18/64 inches. Similarly, the 16th floor is 16/64 inch, which is 6.3mm in mm. So, when other people say floor 16, floor 18, you already know what they’re talking about.

As a result, there are certain concerns about the floor seeds: Is the length of the green beans or the width of the green coffee measured in 6.3mm or 7.1mm? The response is that it will be covered in meshes with holes of 6.3mm or 7.1mm in diameter. In that instance, any beads that do not fall to floor 18 but remain on the floor are categorized as floor 18, while those that fall to level 18 but stay on floor 16 are labeled as floor 16.

However, this categorization is unlikely to be completely correct. As a result, some establishments will label green coffee as 16-18, with a rate of 90 percent or 95 percent on floor 18. And when we talk about green beans 16-18, we’re talking about high-quality green coffee that can be used to make high-quality roasted and ground coffee.


The floor grain measurement system is also used in Vietnam to identify green coffee by bean size. The table below shows the classification of green coffee beans as well as the relationship between coffee-growing locations.

The issue of bean size or floor size is critical for coffee producers and roasters. The size of the green beans, in particular, has an impact on the roasted coffee beans’ durability. The longer the roasting time, the larger the beans, and vice versa. What matters here is the stability of the completed roasted coffee beans, not how long or fast the roasting takes.

It is difficult to maintain the stability of roasted coffee beans in terms of color, quality, and taste if the bean size is not ensured between batches. Furthermore, classifying coffee beans by grain will prevent large and tiny beans from being mixed together in a roasting batch, which will result in an uneven color of roasted coffee beans, impacting taste and quality. Mix it up and have fun with it.

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