Updated: Aug 20, 2021

A set of twelve items. In the bakery trade a dozen is supplied as thirteen. Known as a ‘baker’s dozen’, this is a reminder of the days when the substantial penalties under the law for giving short weight in bread caused bakers to add an extra loaf to a dozen ordered so as to be on the safe side of error. There is also a tradition in the newspaper trade of supplying copies to retailers at thirteen to the dozen invoiced. Where unit costs are very low such a practice can be costeffective in so far as it minimizes time spent dealing with queries on shortages in the number supplied.

Reference: The Penguin Business Dictionary, 3rd edt.

Sources & references
Risk disclaimer
James Knight
Editor of Education
James is the Editor of Education for Invezz, where he covers topics from across the financial world, from the stock market, to cryptocurrency, to macroeconomic markets.... read more.