A study in England found that serving beer in two-thirds of a pint instead of pints led to a significant decrease in the amount of beer sold.
This change could help reduce alcohol-related harm, which affects thousands of people in Britain each year.
The researchers believe that people tend to order by quantity (one beer, one drink) rather than by volume, making smaller servings more appealing.
The study authors also say that the impact of alcohol-related harm can be reduced by considering factors like affordability and advertising.
