For example, p2515 represents the model of this frame.
The size of the mirror frame
For example, 55,17-14c2
55 represents the maximum width of the mirror ring in mm;
17 represents the shortest distance between the two glasses, which is also often called the width of the nose width (the distance between the nose pads). 17mm
14 represents the length of the temples. It should be noted that this length is calculated by straightening the temples. If viewed from the side of the face, it is the fixed distance from the lens to the ear plus the ear hook and the end of the temples.
C2 stands for color number.
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