Different eyewear brands provide different measurements. You can see something like this:
58/33/60/20/130
Usually the firts three numbers reffer to the lens size: 58 - horizontal measurement of a lens, 33 - vertical measurement of the lens, 60 - effective diameter
The forth number stands for the distance between the lenses - 20
The last one is the temple length - 130
(that's all in millimeters)
Some brands provide just 3 measurements, instead of 5. Usually these are lens size (usually the effective diameter of the lens), distance between the lenses and the temple lenghth. For example:
60/20/130
Effective diameter - 60
Distance between the lenses - 20
Temples length - 130
Sometimes it is very difficult to tell how the eyewear fits even if you know all these measurements. But if you decide to buy sunglasses on-line, you can follow some simple rules. Usually smaller frames feature 52mm - 58 mm lens size (or effective diameter in other words), midium fit frames feature 59 mm - 64 mm lens size and larger models feature 65 mm and up lens sizes. the distance between the lenses usually varies between 17 and 20 mm, so it does not make that huge of a difference.
58/33/60/20/130
Usually the firts three numbers reffer to the lens size: 58 - horizontal measurement of a lens, 33 - vertical measurement of the lens, 60 - effective diameter
The forth number stands for the distance between the lenses - 20
The last one is the temple length - 130
(that's all in millimeters)
Some brands provide just 3 measurements, instead of 5. Usually these are lens size (usually the effective diameter of the lens), distance between the lenses and the temple lenghth. For example:
60/20/130
Effective diameter - 60
Distance between the lenses - 20
Temples length - 130
Sometimes it is very difficult to tell how the eyewear fits even if you know all these measurements. But if you decide to buy sunglasses on-line, you can follow some simple rules. Usually smaller frames feature 52mm - 58 mm lens size (or effective diameter in other words), midium fit frames feature 59 mm - 64 mm lens size and larger models feature 65 mm and up lens sizes. the distance between the lenses usually varies between 17 and 20 mm, so it does not make that huge of a difference.
