As an expert sommelier and brewer, I can tell you that the size of a glass of cognac can vary depending on the style and producer. However, the most common type of glass used for tasting cognac is the tulip-shaped glass. These glasses are specifically designed to enhance the aromas and flavors of the spirit.
Typically, tulip-shaped tasting glasses for cognac have a capacity between 5 and 7 ounces. This size is ideal for swirling the cognac in the glass, allowing the aromas to be released and concentrated at the narrower top of the glass. This shape also helps to focus the aromas towards the nose, enhancing the overall tasting experience.
It's worth noting that the size of the glass can also vary depending on the occasion and personal preference. Some individuals may prefer smaller glasses for tasting, while others may opt for larger glasses to savor the cognac over a longer period of time.
When it comes to serving cognac in a social setting, such as at a bar or restaurant, the size of the glass may also vary. In these settings, you may find cognac served in smaller glasses, typically around 2 to 3 ounces. This allows for more servings to be poured from a single bottle, making it more economical for the establishment.
In my personal experience, I have encountered various sizes of cognac glasses depending on the occasion. For formal tastings or special events, the larger tulip-shaped glasses are often used to fully appreciate the nuances of the spirit. On the other hand, in more casual settings or when serving cognac as a digestif after a meal, smaller glasses are commonly used.
Ultimately, the size of a glass of cognac can vary depending on the context and personal preference. However, if you're looking specifically at tulip-shaped tasting glasses, the average capacity would be between 5 and 7 ounces.