Since 1979, metric standards have been in use in the United States and the standard wine bottle size was set at 750 milliliters (ml) or approximately 25.4 ounces, which is almost exactly equivalent to an American fifth (4/5 of a quart or 25.6 ounces). In answer to the stricter driving/alcohol limits in many U.S. states, the wine industry recently introduced a new 500-ml bottle size, which is 2/3 of a standard bottle. In France's beaujolais area a 500-ml bottle (which they call a pot) has long been used. In the United States, other legal bottle sizes include 50 ml, 100 ml, 187 ml, 375 ml, 1 liter, 1.5 liter and 3 liter. Wine may also be bottled in sizes larger than 3 liters if the capacity is in even liter sizes4 liters, 5 liters, 6 liters, etc. Other bottle terminology, although not legally defined in the United States, is still sometimes used in wine circles. These terms, which include French bottle descriptions and approximate bottle sizes, are: splitequivalent to 187 ml or 1/4 of a standard wine bottle; half bottle375 ml; magnum1.5 liters/2 standard bottles; double magnum3 liters/4 standard bottles (in bordeaux); Jeroboam3 liters/4 standard bottles (in champagne) or 4.5 liters/6 standard bottles (in Bordeaux); Rehoboam4.5 liters/6 standard bottles (in Champagne); Methuselah6 liters/8 standard bottles (in Champagne); Imperial6 liters/8 standard bottles (in Bordeaux); Salmanazar9 liters/12 standard bottles; Balthazar12 liters/16 standard bottles; and Nebuchadnezzar15 liters/20 standard bottles.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.