What do the numbers inside my frame mean?

What do the numbers inside my frame mean?

The first group of letters and numbers inside the temple arm is the manufacturer’s model number. Further down the arm come the dimensions in millimeters with eye size, bridge width, and temple length. On most frames, there is also a color name or code afterwards.

EC455 53-17-140 020

EC455: Brand abbreviation and model number
53: Eye size/Lens width
17: Bridge width
140: Temple length
020: Color code

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