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Convenient number
A convenient number is a number which in several situations can prove convenient for use by humans for counting and measuring, and is related to preferred numbers (which are standard recommendations used for choosing product dimensions).
The convenient numbers in this article were developed in the US in connection with the attempted introduction of the metric system in the United States in the 1970s. Hence, they may be viewed as a recommendation for choosing product dimensions when switching to the metric system.
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