As a sommelier and brewer, I can tell you that the size of a standard shot glass in the U.S. can vary depending on the state and establishment. While there are no federal laws dictating the exact measurement of a shot, it is generally accepted that a standard shot is around 1.5 ounces.
It's interesting to note that Utah has actually implemented a legal maximum for shot sizes, making 1.5 ounces the largest shot allowed in the state. This is unique to Utah and not a nationwide regulation.
However, it's important to keep in mind that individual bars and restaurants have the freedom to decide how many ounces are in a shot. This can lead to some variation across different establishments and even different states.
In my experience, I have come across shot glasses with measurements ranging from 1.25 ounces to 2 ounces. Some places may opt for a slightly smaller shot size, while others may offer a larger pour. This can be influenced by factors such as local drinking culture, customer preferences, and even the type of establishment.
For instance, in a cocktail-focused bar, the shot size may be smaller to allow for more precise measurements and the creation of complex mixed drinks. On the other hand, a dive bar or pub might offer larger shots to cater to customers who prefer a stronger pour.
It's worth mentioning that shot sizes can also vary internationally. In some countries, shots may be smaller or larger than the standard 1.5 ounces. I've had the opportunity to travel and explore different drinking cultures, and it's always fascinating to see the variations in shot sizes across countries.
To summarize, while a standard shot in the U.S. is typically around 1.5 ounces, there is no universal size mandated by federal law. The decision on shot size ultimately lies with the individual establishments, and it can range from 1.25 ounces to 2 ounces depending on the state and the preferences of the establishment and its customers.