The term "Small Batch" has never been properly defined, though it always refers to American whiskeys which have been distilled in limited quantity. The most commonplace meaning of the term is for a bourbon or rye whiskey which is distilled in quantities of around 1,000 gallons or less (typically fewer than 20 barrels), from a mash bill of under "200 bushels of grain". The result is almost always more complex, and small batch whiskeys are usually destined for connoisseurs. Famous Small Batch whiskeys include Maker's Mark, Basil Hayden's, Four Roses and Elijah Craig.