ARCO coffee's Colombian Supremo unroasted coffee beans. Colombian Supremo Unroasted 16 ounce. At times we buy Colombian Excelso beans instead of Colombian Supremo beans due to flavor, availability etc.. Excelso beans range from 6-6.75 mm. Colombian Supremo beans are slightly larger at 7-8 mm. If you need the Colombian Supremo beans and cannot use the Colombian Excelso beans, please let us know.