First, you’ll want to find an eyeglass frame that fits you well. If you don’t own a pair of eyeglasses, you’ll want to try on some frames at a local optical shop or drugstore.  There is often a section in the pharmacy for ‘magnified readers’ – this is a great, free way to try out sizes.  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.  If you already own a pair of eyeglasses, you can skip the try-on phase! Already have a frame you love?  Try our Send-In-Your-Frame Service.  We recommend trying a non-prescription pair of Axon Optics lenses in one of our frames first, to be sure you like the tint before investing in the non-refundable Send-In-Your-Frame Service.


So what are the measurements and what do they mean? The measurements are in millimeters. One of the cool things about eyeglass measurements is that they use universal measurements instead of an arbitrary system.  You’ll usually see a frame name, then color, followed by three numbers separated by dashes.


This example eyeglass frame has the frame name on one arm, with the measurement and color on the other.  The right arm says ‘Capri US 59′ and the left arm says ’53-16-135 BROWN’. In this case, ‘53’ is the Eye measurement; ‘16’ is the Bridge measurement, and ‘135’ is the Arm measurement. Eye – Also known as the ‘A’ measurement, this is the lens width. The first number, it measures the width of each lens in millimeters. This example pair of eyeglasses has ‘53’ for this measurement, which means each lens is 53 millimeters wide. Bridge – 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. Make sure it is comfortable across the bridge and does not pinch.


Other things to consider: do I like a solid bridge that rests directly against the nose, or do I like one with little silicone nosepads that prop it up?  In our example pair, ‘16’ means that the bridge across the nose of this pair of eyeglasses is 16 millimeters wide. Temple: Measures length of the arms on the frame. 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. You won’t see much variation in this number, as most glasses are 130, 135, or 140. This number only matters if you have problems with the frame arms sticking out from the back of your head (too long), or cutting into the ear at the bend (too short).   In our example pair, the arms are 135 millimeters long. 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.