The measurements on the inside of the frame represent the lens width (50 mm), bridge width (22 mm), and temple length (140 mm). If you have a favorite pair of glasses, you can look at this measurement to figure out which of our pairs will fit you the best.
Lens width50 mm
The width of one single lens.
Bridge width22 mm
The measurement between the lenses.
Temple length140 mm
The measurement from the front of the frame to the back of the arms.
Bought these for my mom, the clear frame ones. She digs em, they're a timeless style and go good with any outfit.
Also fyi there are clear lens protector films on these, don't get tricked like I did into thinking the lenses came scratched up and foggy.