Final answer:
Draft beers typically come in two sizes, a pint (16 ounces) and a half pint (8 ounces), which provide options for different preferences in quantity.
Step-by-step explanation:
The two common sizes for draft beer are generally known as a pint and a half pint, with the pint being the larger of the two sizes. The term 'pint' can vary by country, but in the United States, a pint is typically 16 ounces, while a half pint is 8 ounces. Pint and half pint options are often seen in pubs and breweries, allowing customers to choose based on their preference for quantity.