Eyeglass Frames Size guide
There are several measurements when it comes to eyeglasses, of which there are 5 important measurements
Here’s what you need to know.
Chances are that your current glasses have measurements engraved on the inside of the temples. A temple may contain: the brand, model name and 50 □ 19 140 , 50/19 140 or 50 19-140. These measurements indicate three frame dimensions—lens width, bridge width, and temple length. The overall frame width, however, will not be printed on the temple arm.
Once you know the measurements of your current glasses, you can easily choose the right pair of Spectaculars glasses that best suit you.
Lens Width

Measure the lens horizontally, at its widest point.
Bridge Width

Measure horizontally, from one edge of the bridge to the other.
Temple Length

Measure from the hinge—where the arm connects in the front— to the spot where the arm begins to bend down around the ear. Then measure from the top of the bend to the bottom tip. Add these together for the total temple arm length.
Overall Frame Width

Measure the horizontal front of the frame, from one end to the other
Lens Height

Measure lenses vertically at their tallest points.