Cinzia CIN-5063 Eyeglasses

If you already own a pair of glasses, you’ll find numbers engraved on the inside of the eyewear temple.
These numbers indicate the following:

LensWidth50

BridgeWidth18

TempleLength140

LENSHEIGHT37

The first number is the lens width followed by the bridge width. The third number that represents the temple length, or the measurement of the 'arms' of your frame.
In some cases there may be a fourth number that indicates the lens height.

Measurements in mm.