How Many Milliliters in a Shot Glass?

Did you know there are three sizes of shot glasses? In the U.S., a regular shot contains 1.5 fluid ounces, which is 44.36 milliliters. A pony, or jigger, is 1 fluid ounce, or 29.57 milliliters. Then, a double shot is 2.5 fluid ounces, or 73.93 milliliters.