Magnum

Magnum wine bottle meaning

A magnum is a wine bottle containing 1.5 liters, exactly equal to two 750 mL bottles. The name is used for both still wine and Champagne; the Comité Champagne’s official size list also assigns magnum to 1.5 L.

At nominal capacity, a magnum contains about 10.1 five-ounce volume units. That figure is inventory math, not a suggested number of servings or pace.

Larger format can change the relationship between wine volume and headspace or closure exposure, but size alone does not guarantee slower aging or higher quality. Wine composition, oxygen at bottling, closure, pressure where relevant, storage, and production method still matter.

For large-format names above magnum—where regional naming diverges—use the wine bottle sizes chart.

Source: Comité Champagne bottle-size FAQ.