Indeed, the volume varies from one region to another because of tradition and long local history of winemaking. In Bordeaux, a barrique contains 225 liters (60 US gallons). In Burgundy, it is 228 liters and is called a piece while in the Loire Valley it is 232 liters. Tonneau is another word used for barrel. In Bordeaux a tonneau contains 900 liters and means 4 barriques.