What is the standard size of a beer according to SFST?

The standard size of a beer according to the Standardized Field Sobriety Tests (SFST) is 12 ounces. This quantity is recognized as the equivalent of one standard drink, which contains approximately 0.6 ounces of pure alcohol. Understanding this standard is crucial for law enforcement officers when assessing impaired driving, as it establishes a baseline for evaluating an individual's consumption.

In traffic enforcement situations, knowing the standard measurement helps officers determine how many drinks a person may have had based on observable behavior and testing results. This knowledge is essential for administering sobriety tests and interpreting their outcomes effectively in relation to blood alcohol concentration (BAC) levels and overall impairment.

The other options reflect sizes that are non-standard for beer and may lead to misconceptions about alcohol consumption levels, which can impact an officer’s assessment during traffic stops.