30 ml (1 US fl oz) 44 ml (1.5 US fl oz) 59 to 89 ml (2 to 3 US fl oz) There is no standard size for a single shot, except in Utah, where a shot is defined as 1.5 US fl oz (44 ml). Elsewhere in the U.S., the standard size is generally considered to be 1.25â1.5 US fl oz (37â44 ml).