In the United States, a standard "shot" of alcohol is typically 1.5 fluid ounces, which is equivalent to approximately 44 milliliters (ml). However, shot sizes are not legally mandated and can vary significantly depending on the country or the specific establishment. In the United Kingdom and much of Europe, a single shot is more commonly 25 ml or 35 ml, while a double is 50 ml. In contrast, some bars in Japan or Australia may use a 30 ml standard. For those tracking their consumption or mixing cocktails at home, it is important to note that a standard 750 ml bottle of spirits contains roughly 17 shots (at the 1.5 oz size). While some "shooter" glasses may appear larger, they often have a thick glass base that reduces the actual liquid volume. Always check the menu or ask the bartender if you are looking for a "double" or a "pony shot" (which is typically a smaller 1-ounce pour) to ensure you are getting the measurement you expect.