Draft beer sizes can vary depending on the type of beer and the establishment serving it. Common sizes in the US include:
Small or half pint: around 8 ounces
Pint: 16 ounces (US pint)
Large or Imperial pint: 20 ounces (UK pint)
Keep in mind that some places may offer different sizes, such as 10, 12, or 14 ounces, to better cater to specific beers.