Why are red wines served in larger-sized glasses?

The reasoning behind serving red wines in larger-sized glasses predominantly relates to the development of aromas and flavors. The larger bowl of the glass allows for greater exposure to air, which facilitates the oxidation process, enhancing the wine's aromatic profile and complexity. As red wines often possess more robust flavors and tannins compared to whites, the larger glass helps to balance the intensity and allows the drinker to fully appreciate the wine's characteristics.

While larger glasses can indeed hold more volume, the primary function of the design is to enhance the sensory experience of the wine. The shape of the glass captures and concentrates the complex aromas, encouraging an enjoyable tasting experience. Hence, the capacity of a red wine glass serves more than just a practical purpose; it is instrumental in elevating the overall enjoyment of the wine.