A jigger is 1.5 oz and a pony jigger is 1 oz.
Source: see the Related Link below.
a jigger is unequivocally 1 and 1/2 ounces. [FYI: a shot or pony shot are 1 ounce]
A jigger is a bartending tool used to measure liquor, which is typically then poured into a cocktail shaker. It is named for the unit of liquid it typically measures, a 1.5 fluid ounce. Therefore, 4 jiggers would equal 6 ounces.*One should note that jiggers can be purchased in other unmarked sizes and may not actually measure a fluid jigger.
To count and pour liquor accurately, use a jigger or measuring tool to ensure precise measurements. For example, a standard jigger typically measures 1.5 ounces on one side and 1 ounce on the other. Pour the liquor slowly and steadily into the jigger, making sure it reaches the desired measurement line. Practice and consistency are key to mastering the skill of accurate pouring.
1 jigger (or shot) is 1.5 US fluid ounces.
About 50.72 ounces.
About 27 ounces
2 ounces
16
One shot of any liquor is 1.5 ounces.
A jigger used in alcohol measures is 44 millilitres.
1.5 ounces http://www.webtender.com/handbook/measurements.html
2 oz
8 US fluid ounces to a cup