A standard glass of wine in the United States typically contains 5 ounces (about 147 milliliters). This serving size is widely used in restaurants and recommended by health authorities to balance flavor, aroma, and alcohol content

. The total capacity of a standard wine glass is usually larger (12 to 16 ounces) to allow room for swirling and releasing aromas, but the standard pour remains 5 ounces for a typical serving

. A standard 750 ml bottle of wine holds about 25.4 ounces , which yields approximately five 5-ounce glasses of wine

. Serving sizes can vary depending on the type of wine and alcohol content:

• Lower alcohol wines (5%-12% ABV) may be served in larger pours, around 6 to 11 ounces.
• Higher alcohol wines (13%-15% ABV) are usually served in 4.5 to 5 ounce pours.
• Fortified wines (16%-20% ABV), like Port or Sherry, are served in smaller portions of about 1.5 to 2 ounces

In summary, the standard glass of wine is 5 ounces, and a standard bottle contains about five such servings. Variations exist based on wine style and alcohol strength.