when you buy a sunglasses online, maybe you will confuse about how to choose the right size of the glasses legs because you try to wear on the website. Spectacle frames are standard optical products, just like human clothes and shoes, and have their own sizes.Because the size of each person's head is quite different, the length of sunglasses legs also should be different.
How to measure a glasses legs is suited you or not?
That is, the legs should be just right for your ears, neither slipping nor clamping the ear.
Now glasses legs are between 130mm to 150mm in general specifications, commonly 135mm-140mm. Sunglasses, for example, the legs is 135mm long in most cases., and the frames are mostly 140mm.
Usually, the specifications of the glasses size are marked on the inside of the legs, the bridge of the nose or the label.
Generally speaking, the sunglasses frame will be marked with examples of three data: the frame width, width of the nose(bridge width), length of the legs(temple).
1. Look at the data of the sunglasses that are being worn now (usually labeled on the inside of the leg), and compare the data with the data shown above.
2. You can use a ruler to measure the glasses you are wearing now, the method is as follows positive and negative measurement schematic diagram, obtain data and the above data comparison.
3. Try to a glasses shop, write down the size of your own size.
4. With the ruler to measure the distance between temples, and then refer to figure 1 in the width of the inner side of the sunglasses frame, usually the width of the width of the frame can be consistent with the value of the temple, or greater than the temple value of 3mm.
In the process of buying sunglasses, you must look at the materials of various sunglasses, and find the real best one for yourself.
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