What Is Small Coffee Bean? Arabica Basics Explained

Ever wondered why some coffee beans are called 'small' while others aren't? Or why your favorite brew has hints of berry, chocolate, or citrus? The answer starts with the coffee plant species—and the most famous of them all is Coffea arabica, the one behind what many call 'small coffee beans.' Whether you're choosing beans or just curious about your morning cup, understanding these origins makes every sip more meaningful.

Small coffee beans usually refer to Coffea arabica, the most cultivated and refined coffee species. Also known as Arabica, it produces smaller fruit and beans compared to other commercial types like Robusta. Arabica accounts for over 60% of global coffee production and is the foundation of specialty coffee. Its cultivars, such as Typica and Bourbon, trace back to Ethiopia and Yemen—where coffee first became a global crop.

The Origins and Global Journey of Coffee

Coffee, scientifically named Coffea arabica, is also called Arabian coffee or simply the coffee tree. It’s actually the national flower of Yemen, which was historically known as Arabia until the 6th century. That’s why coffee plants from there were once called 'Arabian coffee trees.' The word 'coffee' itself comes from the Arabic 'Qahwah,' meaning a plant-based drink. Over time, as the drink spread, the name shifted to 'Kaffa'—the Ethiopian region believed to be its birthplace—and eventually became 'coffee' in English by the 18th century.

Traders and pilgrims helped coffee escape its birthplace. Despite strict controls in Yemen’s port city of Mocha, where armed guards protected shipments and seed exports were banned, coffee seeds were smuggled out—often by Muslim pilgrims traveling to Mecca. These seeds reached India, then Europe via Venice’s trade routes, and later Dutch colonies in Indonesia. By the 17th century, coffee had reached Africa, Asia, and the Americas, becoming the second-most traded commodity after oil.

The Three Main Coffee Species

There are three primary coffee species cultivated worldwide: Coffea arabica (small coffee bean), Coffea canephora (commonly known as Robusta), and Coffea liberica (large coffee bean). Arabica is the smallest in fruit and bean size, and the most widely consumed for specialty coffee. These species originated in Africa and the Arabian Peninsula, and today over 76 countries grow coffee. Notably, China began cultivating coffee in Taiwan in 1884, and later in Hainan, Yunnan, Guangxi, and Guangdong—with Yunnan now being the dominant region.

Yemen holds a special place in coffee history. It was the first country to cultivate coffee commercially, and to this day, many Yemeni farms avoid chemical fertilizers. Coffee trees grow on terraced slopes under the shade of native trees, maximizing limited rainfall. Yemeni coffee, particularly Mocha varieties, is still packed in straw baskets rather than synthetic bags, preserving traditional processing methods.

What Makes a Small Coffee Bean? Botany and Traits

So what exactly is a small coffee bean? Scientifically, it refers to Coffea arabica L., the most prominent species in specialty coffee. Its full classification is: Family Rubiaceae , Genus Coffea, Species arabica. Other common names include Arabian coffee and, when comparing sizes, it’s dubbed the 'small coffee bean' mainly because its fruits and seeds are smaller than those of Robusta (Coffea canephora) or Liberica (Coffea liberica).

Arabica plants grow as small trees or large shrubs, reaching 5–8 meters tall. They have horizontal, paired side branches, with oval leaves and fragrant white flowers that grow in clusters. The coffee cherry is an oval drupe: 1.2–1.6 cm long, turning from deep green to yellow-red or purple when ripe. Each cherry typically holds two seeds (the coffee beans), surrounded by layers including pulp, parchment, and silver skin. The actual bean is just the inner seed—everything else is typically discarded in processing.

Arabica coffee thrives at higher altitudes and cooler climates, which slows growth and develops more complex flavors. In China, it’s mainly grown in Yunnan, where French missionaries first introduced it in 1904—bringing Typica seeds to the village of Zhugula in Binchuan County. Over a century later, Yunnan Arabica has become a key origin for specialty roasters worldwide.

Coffee Chemistry: What’s Inside the Bean?

Coffee isn’t just caffeine—it’s a complex mix of compounds that create aroma, flavor, and body. Every bean contains:

• Caffeine: Bitter and stimulating, it boosts energy, aids digestion, and increases urine output—but too much leads to overdose.
• Tannins (Tannic acid): Can turn bitter if coffee is over-brewed.
• Fats: Include volatile and acidic fats, where volatile fats contribute to coffee’s iconic aroma (with around 40 aromatic compounds).
• Proteins: Provide some calories but mostly stay in the grounds during brewing.
• Sugars: About 8% in raw beans, these caramelize during roasting to create sweetness and brown color.
• Fiber: Turns to carbon during roasting, affecting color and body.
• Minerals: Includes calcium, iron, phosphorus, and others in small amounts.

Here’s a detailed breakdown per 100g of coffee beans and liquid brew:

• Beans (100g): 2.2g water, 12.6g protein, 16g fat, 46.7g sugar, 9g fiber, 4.2g ash, plus minerals like 120mg calcium, 170mg phosphorus, 42mg iron; vitamins and caffeine at 1.3g.
• Brew (100ml): 99.5g water, minimal protein/fat, 0.2g ash, 3mg calcium, 4mg phosphorus, 2mg sodium, 0.01mg vitamin B2, 0.3mg niacin.
• Per 10g brewed: 0.04g caffeine, 0.06g tannins.

Yunnan Arabica: China’s Specialty Coffee

In China, Yunnan is the heartland of coffee production. The region’s Arabica is often called 'small coffee bean' due to its Typica and Bourbon lineage—both small-bean cultivars of Coffea arabica. Yunnan’s coffee history began in 1904 when French missionaries planted the first Typica seeds in Zhugula. Over the past century, the province developed a unique terroir ideal for Arabica, especially in regions like Baoshan and Pu’er.

At FrontStreet Coffee, our Yunnan Arabica is sourced from the Baoshan area, processed using washed methods and roasted to medium levels. It offers soft notes of nut, chocolate, and mild plum acidity—making it a smooth entry point for exploring specialty coffee. For a deeper dive, our 2013 Typica Natural showcases matured red cherries with flavors of dark berries, caramel, dried apricot, and a tea-like finish. We also blend Yunnan Arabica with Brazilian beans in our Black Cocoa Blend, balancing chocolate, citrus, and almond milk textures for espresso drinks.

Recommended FrontStreet Beans for Small Coffee Bean Fans

Explore the classic taste of Yunnan small coffee beans with FrontStreet Coffee’s Yunnan Arabica, a washed and medium-roasted single origin with soft nut, chocolate, and plum notes. For a purer expression, try the 2013 Typica Natural, made from fully ripe red cherries and offering deep berry, caramel, and apricot flavors with tea-like aftertaste. Our Black Cocoa Blend combines Yunnan Arabica with Brazilian beans for a balanced espresso with chocolate, nuts, and almond milk smoothness. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.