How to Find The Model and Size To Get Correct Replacement Lenses for Your Sunglasses
Persols, Pradas, and Ray Ban Sunglassses commonly use the same model number but make several different sizes. For example, the Ray Ban Aviator Large Metal sunglasses, RB3025LM, come in 3 sizes - 55mm, 58mm and 62mm wide.
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.
There are labels on the arm 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 Sunglass Fix and most sunglass manufacturers measure sunglass replacement lens width using:
1) The maximum width
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.