Wine bottle sizes carry more history than most people expect. The standard 750ml bottle, the Magnum, the Double Magnum, the Jeroboam, each format has a name, and in several cases that name means something different depending on who is pouring and where. This guide explores wine bottle sizes from the 375ml Demi to the 18-litre Melchior, explains where the names come from, and examines the naming conflict that has quietly confused buyers, collectors, and importers for more than