Have you ever noticed the series of numbers on the inside of your frames? These numbers actually have significant meaning to them, and knowing what they mean can help you the next time you are looking to purchase new glasses. The numbers are hidden on the inside of the eyeglass frames to not ruin the look. 

What do the numbers mean?

If you look at your glasses, you might see a number that looks like xx-xx-xxx. All three of these numbers can help when choosing the best frames for the size of your head. These numbers are all measured in millimeters (mm).

The first number is a two-digit number and represents the eye size. It is the horizontal width of the lenses and usually ranges between 40 mm to 62 mm.

The second number will also be a two-digit number which represents the distance between the two lenses. This area is the part of the eyeglasses that sits on your nose. This number will range from 14 mm to 24 mm.

The last number is always a three-digit number and represents the length from the frame to the part of the eyeglasses that sits on your ears. This number will range from 120 mm to 150 mm.

You may also see other numbers that sometimes include letters. This number is most likely the model of the glasses.

Understanding what these numbers mean can be extremely helpful when you are looking for a new pair of glasses. If you are looking for a new set of optical or sunglass frames, our staff at the Sunglass Shoppe can help you find the ones that are right for you. The Sunglass Shoppe offers premium products and the latest optical technology that can meet your specific needs.

Visit one of our shops located in Petoskey, Charlevoix, Traverse City, and our newest location, Saugatuck, MI.