A jeroboam is an oversize wine bottle; however, the exact size is not standardized. It may be equivalent to 4, 5 or 6 standard (750 ml) bottles, depending upon the wine producer. In Champagne, France and in California, it is often 3 liters in size; in Bordeaux, 3.75 liters; in England, as much as 4.5 liters. (Wine/Service)