There are so many different size wine glasses out there. From 120 mL to 750 mL, wine glasses vary in size as well as shape. They also have different purposes. A larger wine glass is good for proper aeration of the wine which exposes it's aromas better and different style glasses compliment different grape varieties.
But did you know that the larger the wine glass, the more you drink?
A study that was conducted by the University of Cambridge and funded by the UK department of health said that when wine is served in a larger glass people drink it faster, therefore consuming more.
To test their theory, their experiment was conducted in a Cambridge pub for 16 weeks. They served wine in 370 mL and 252 mL glasses where it usually was served in 300 mL glasses. At the end of their experiment they found that about a tenth more wine had been consumed than with the standard glass size.
Surprisingly, they noted that while they increased the size of the glass, they didn't increase the amount of wine that was served, yet people still consumed more. Unsure of the reason for this, they speculate that it may be due to the change in perception people have toward the wine; therefore, they drink faster and order more.