How Are Sunglasses Measured?

When it comes to sunglasses, getting the perfect fit is essential. No matter how stylish or protective the sunglasses are, it won’t serve it’s purpose if it’s not the right size.

The key measurements that describe sunglasses sizes are the:

  1. Eye size
  2. Bridge size
  3. Temple length.

Frame measurements are specified in millimeters (mm). Usually, frame sizes are indicated by three numbers stamped on the inside of your sunglasses.

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  1. Eye Size or Lens Width is the horizontal width of the lenses in sunglasses. It is the first number on the frame.
  2. Bridge Size is the distance between the lenses. Simply put, it is the size of the bridge of the frame that rests on your nose. It usually varies between 14 and 24 millimeters.
  3. Temple Length is the length of the ‘arms’ or ‘stems’ of the frame. It is basically the ‘arm’ that keeps the sunglasses on your face. It is measured from the hinge of the frame to the end tip of the temple. It is usually 135,140 or 145 millimeters in average.

Another measurement is Vertical Eye Size or Lens Height. It is only necessary when ordering for multi focal lenses. Lens Height refers to the vertical height of an eyeglasses lens, and is measured from the tip to the bottom of the lens. Sizes may differ depending on the brand, but the standard size of Vertical Eye Size is somewhere between 32 and 38 millimeters.

How to find your Perfect Sunglasses Size

There is no one size fits all when it comes to sunglasses. There are different faces shapes, different sunglasses shapes and different brands that manufacture different sizes. However, there is no need to panic if you don’t know your sunglasses size or you can’t seem to be able to find the right size for you. There are many simple ways you can figure out your perfect size. Some of them are:

  1. Use a pair of old sunglasses: You can use a pair of sunglasses you currently own to determine your best size. Alternatively, you can also try on a pair from a friend to see if it fits you. When you see a pair that fits, look closely at the inscriptions on its frames to see digits that will help you find the right size for your new glasses. Most often, you’ll find the size information on the inside of the left temple. However, you should keep in mind that each pair of sunglasses is different depending on the brand.
  2. Measure your face size with a ruler: This is another effective way of knowing your sunglasses size. Looking into the mirror, hold a ruler so it is lined up with your temple. Measure (in inches) the distance across your face, from one temple to the other. That distance is the best frame size for your fave. Most temples run from 5 to 7 inches long. The average for men is 5 inches (145 millimeters ) and for women it is 5 inches (133 millimeters) or 5 inches (139 millimeters).
  3. Use a credit card for Lens Measurements: While Lens may vary by brand, most credit cards are the approximate width of a medium or standard size lens. To do the measurement, take any credit or debit card and hold it vertically while standing in front of a mirror. Place the card on the bridge of your nose. If the end of the card extends to the edge of your eye, you should get Standard sized Sunglasses. If the card extends well beyond the edge of your eye, you should get a small size. If the end of the card does not reach the end of your eye, then go for a Large size.