Frame size specs are typically printed on the inside of your glasses' temples (arms) or on the bridge of the nose, and they tell you the dimensions of the frame. They're usually presented as three numbers separated by dashes or spaces, such as "54-16-140." Here's how to interpret them:
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Lens Width: The first number (e.g., 54) indicates the width of one lens in millimeters. This measurement is taken at the widest point of the lens.
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Bridge Width: The second number (e.g., 16) represents the distance between the lenses, also in millimeters. This is the part of the frame that sits on your nose.
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Temple Length: The third number (e.g., 140) refers to the length of the temple arms, from the hinge to the end, measured in millimeters.
Therefore, in the example "54-16-140," the lens width is 54mm, the bridge width is 16mm, and the temple length is 140mm. Knowing these measurements can help you find frames that fit comfortably and properly on your face. You can compare these measurements to your current glasses to ensure a good fit with a new pair. Keep in mind that small variations (1-2mm) are generally acceptable, but significant differences might affect comfort and appearance.
