If you don’t own a pair of eyeglasses, you’ll want to try on some frames at a local optical shop or drugstore.  Once you find a pair that fits well, write down the measurements written on the inside arm.  Note the measurements of any pairs you love, and then seek similar pairs.  

Already have a frame you love?  Try our Send in your Frame service.  

Eyeglass Measurements

The measurements are in millimeters.  You’ll usually see a frame name, then color, followed by three numbers separated by dashes.

This example eyeglass frame says 53-16-135. In this case: 

  • 53mm is the Lens width measurement for one lens left to right. 
  • 16mm is the Bridge measurement. Also known as the ‘DBL’ measurement, this measures the width across the bridge of the nose. You can be over, but you don’t want to be under with this number, or the glasses will pinch. 
  • 135mm is the Arm measurement. It measures from where the hinge connects to the front of your glasses at the temple…all the way through the curved part behind the ear. 

Try to find a size similar to a pair that fits you comfortably.  If one measurement is too tight, consider a pair with a higher number for that measurement.  If one measurement is too loose, consider a pair with a lower number.

All of our frames are carefully selected to be lightweight with the greatest possible coverage area.  When selecting a frame in person, consider the fit, style, and size for best results.  In a hurry to get a pair of our lenses? Our frames are intended to fit most people.  Try one of our styles with non-prescription lenses – if it doesn’t fit, you can exchange it.