What is the smallest size of wine sold?

The smallest size of wine sold in the options provided is the glass size, which typically contains 6 ounces. This is a standard serving size in many restaurants and bars, suitable for tasting or enjoying wine by the glass rather than by the bottle. The glass allows for varietal expression and tasting without committing to a whole bottle.

When considering other options, a terzo, which is a 9 oz serving, is larger than a glass. The half bottle, at 375 ml, is equivalent to about 12.7 oz, providing more wine than a single glass would. A full bottle, containing 750 ml or approximately 25.4 oz, is clearly much larger than the glass serving. Thus, the glass size stands out as the smallest option for wine typically sold.