How to Find The Model and Size To Get Correct Replacement Lenses for Your Sunglasses
So how to you determine which is the the size and model of your current frames? You can measure them at their widest point as the crow flies. However, with two to three millimeters difference it can be hard.
Most sunglasses have a writing on the arms or under the nose bridge that should provide the required information. Additionally, the information may be on your original packaging. However, it's always best to check your frames we have seen many major department stores pack the sunglasses in the wrong boxes.
The Industry Standard and The Sunglass Fix measure lenses at the maximum with as the crow flies. Not along the curve of the lenses.
1) The maximum width in Millimeters (convert inches by making into decimal and multiplying by 25.4)
Example: 2 and 3/8's of an inch becomes 2,875 inches * 25.4 = 60mm
2) As the crow flies, not along the curve of the lens
Manual Measurements using calipers or a ruler: Allow 1/2 to 2 mm for lens portion under rim.