Question: what is the standard size of a jigger?
Answer: A standard jigger is 1.5 ounces on its large side and 3/4 ounces on its small side. So, if you're using the large end of a jigger to make a drink, your pour will be 1.5 ounces. Jiggers are the little hourglass-shaped measuring tools that countless bartenders use.