Disclosed is a dimension measuring system having: a voice input/output device, worn inside the ear of a worker, that creates a voice signal from the air vibrations that are emitted from the eardrum of a worker and propagated within the ear, and outputs the voice signal; and an information processing device that implements a voice recognition function that recognizes the measurements of the dimensions of an object to be measured from the voice signal outputted from the voice input/output device, and also implements a determination function that determines whether or not the measurements of the object fulfill a standard value.
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