What are sizes of cognac there?

Pony (200ml): Also petite in size, perfect for a single-serve cocktail.

Split (200-250ml): Slightly larger than a pony and commonly used in restaurants.

Flask (350-375ml): A narrow bottle of a larger size, well-suited for travel.

Half-bottle (375-500ml): Commonly called a "demi," it contains half the amount of a standard bottle.

Standard bottle (700-750ml): This is the most common size found on shelves and is considered a full bottle.

Magnum (1.5L): Twice the size of a standard bottle, often associated with large gatherings.

Jeroboam (3L): Named after King Rehoboam, it's four times the size of a standard bottle.

Imperial (6L): An impressive bottle, eight times the size of a standard bottle and best suited for a large party or as a gift.

Salmanazar (9L): A rare size, holding twelve times the volume of a standard bottle.

Balthazar (12L): Majestic in size, this bottle holds sixteen times the amount of a standard bottle and is a coveted collector's item.

Nebuchadnezzar (15L): Named after the legendary Babylonian king, this massive bottle contains twenty times the volume of a standard bottle.

Melchior (18L): Even rarer, holds twenty-four times the size of a standard bottle.