The size here is to allow for your biggest, most powerful and expressive wines to fully breathe and develop. For the alcohol to integrate with the fruit notes; the acid to balance the tannins (and, when necessary, the oak.) Use this glass with mighty Cabernets and Chardonnays, the most powerful Nebbiolo, Barbaresco, Barolo and Barberas, and Pinots that lean towards the fruit-bomb style. It is also fascinating to see what an older vintage, more complex white wine will do here, such as a cellared Gruner Veltliner Smaragd or Reserve.