Frame Size:

TAVAT Frame Size


Each eyeglass frame has a series of 3 numbers imprinted either on the inside of the eyewear temple, inside the eyewear bridge(across the nose piece) or in a plastic eyeglass frame it is sometimes stamped on the nose piece of the eyewear.

These eyewear size numbers are always in millimeters so we can get a more accurate measurement, since we are measuring a very small area like on an eyeglass frame.

The eyeglass numbers are usually written as: 49-19-135 or they might have small boxes between the numbers on the eyeglass frame.


1. The first number in the eyeglass size is the distance across one lens of the eyeglass frame ( does not include the frame)

2.The second number in the eyeglass size is the distance across the bridge on the eyeglass frame or sometimes refered to as the DBL(distance between lenses)

3.The third number in the eyeglass size is the length of the temple(arm piece) from the front of the eyeglass frame to the end of the temple, which goes behind the ear.