A proper wine glass should be large enough to contain a full serving without approaching being halfway filled. A glass of from ten to fourteen ounce capacity works well. This provides adequate space for both swirling without spilling and to gain the “chimney effect” that concentrates and directs the vapors that carry the wine’s smells. A glass of this size is also not so large as to be awkward or unwieldy.
The International Organization for Standardization (ISO) has recognized a particular shape that is the accepted benchmark at all wine judging and competitions. It is also suitable for the average wine drinker as an all around, every day glass. It should be made of transparent, colorless glass with a lead content of up to 9%. Its dimensions are just under 6 inches (155 mm) tall, with a two inch (5 cm) tall stem and a four-inch (100 mm) tall bowl, about two and a half inches (65 mm) at its widest diameter and two inches (46 mm) across the rim.
One Glass of Wine Contains: