what is the standard drinking size in ounces for wine?

The standard serving size for wine in the United States is 5 ounces. This serving size corresponds to a drink with about 12% alcohol by volume (ABV) and contains approximately 14 grams of pure alcohol. A standard 750 ml bottle of wine typically provides five 5-ounce servings. This pour size is designed to optimize the wine experience by allowing one to savor the wine's aromas and flavors and encourage responsible drinking. While wine glasses can vary widely in total capacity, the 5-ounce pour is the generally accepted standard serving size for most wines.