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The beauty micrometer, also known as the beauty calibrator, was a device designed in the early 1930s to help measure a woman's beauty through flaws in their facial features.

Placed on and around the head and face, the beauty micrometer uses flexible metal strips which align with a person's facial features. The screws holding the strips in place allow for 325 adjustments, enabling the operator to make fine measurements with a precision of one thousandth of an inch. The inventors stated that there are two key measurements that they looked for: the heights of the nose and forehead should be the same, and the eyes should be separated by the width of one eye. When an imperfection is identified, corrective make-up can be applied to enhance or subdue the feature.