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 sizes — 4 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: split — equivalent to 187 ml or 1/;4 of a standard wine bottle; half bottle — 375 ml; magnum — 1. 5 liters/2 standard bottles; double magnum — 3 liters/4 standard bottles (in bordeaux); Jeroboam — 3 liters/4 standard bottles (in champagne) or 4. 5 liters/6 standard bottles (in Bordeaux); Rehoboam — 4. 5 liters/6 standard bottles (in Champagne); Methuselah — 6 liters/8 standard bottles (in Champagne); Imperial — 6 liters/8 standard bottles (in Bordeaux); Salmanazar — 9 liters/12 standard bottles; Balthazar — 12 liters/16 standard bottles; and Nebuchadnezzar — 15 liters/20 standard bottles.