Wine Bottle Sizes:

Half Bottle = (Split) 375ml
Bottle = 750ml
Magnum = 2 bottles (1.5 liters) Bordeaux & Champagne
Marie-Jeanne = 3 bottles (2.25 liters)Bordeaux
Double Magnum = 4 bottles (3 liters)Bordeaux & Champagne
Jeroboam = There are two sizes of Jeroboams: the sparkling wine Jeroboam equals 4 regular bottles, or 3 liters; the still wine Jeroboam equals 6 regular bottles, or 4.5 liters of wine. Some 5.0 liter Jeroboams exist.
Rehoboam = 6 bottles (no longer made)
Imperial = 8 bottles (6 liters)
Methuselah = 8 bottles (6 liters) Champagne
Salmanazar = 12 bottles (9 liters)Champagne
Balthazar = 16 bottles (12 liters)Champagne
Nebuchadnezzar = 20 bottles (15 liters)Champagne