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How Do I Measure The Size Of My Eyeglasses?

by Eric Gathoni

How Do I Measure The Size Of My Eyeglasses?

Purchasing a new pair of eyeglasses can be easy, especially when it is done through an online store. But, you need to understand the importance of knowing the right measurements and the size of your spectacles, so that they are comfortable and perfect for your face. It is important to choose comfortable eyeglass sizes because you will be wearing them for most of the day, so they have to feel and look good. Look for frames that are not too heavy or small, they shouldn’t hurt the bridge of your nose or the back of your ears. Additionally, you wouldn’t want to sacrifice style for comfort; hence, you will want a frame style that suits your face shape and is functional.

When choosing the right  you need to keep in mind the following questions:

  • Are you going to use them daily?

           - If the answer is yes, then you will need a sturdy pair

  • Are you looking for a pair that will be worn for special occasions?

           - If so, then you must look for a pair that is light and has a colorful frame

Another important aspect you must consider is your lifestyle and environment, when checking an eyeglass frame measurement chart, you will need spectacles that can withstand external elements and won’t break easily or slide down your nose constantly. You can always consult an eyeglasses sizes chart to know about measurements that will keep the spectacles in place, on your face.

Understanding your eyeglass sizes is crucial because you wouldn’t want to be constantly distracted by uncomfortable and ill-fitting eyeglasses. In this article, we will go through the various measurements you must check, before selecting eyewear; this guide will be helpful if you are planning to purchase the glasses online.

Measuring your Eyeglasses:


Whether you are trying to find the best spectacles for casual or daily wear, you need to know how to measure various parts of the eyeglasses to get a precise fit. Let’s have a look at the various measurements you must take, to find the perfect eyeglasses.

How to find the right frame size?

If you have an old pair of glasses that have the right fit, then you are halfway there! Take a look at the inside portion of the arm pieces, and you will see numbers that are separated by dashes and squares. If you don’t find them on the arm, you may find the numbers on the bridge of the frames.

The numbers may seem confusing at first, but here is what they mean:

  • The first number signifies the lens width, it will be between 40 and 60mm. This measurement is followed by a square icon
  • The second number will tell you the bridge width, and it will be between 14 to 24 mm
  • The third number signifies the temple length, and it is probably between 120 and 50mm. This measurement will usually end in zero and five
  • The measurements will usually end with three units, if you find four units then the latest will usually be between 32 and 38 mm

How to identify your lens width?

The lens width is measured in millimeters, from one side to the other. This is also known as eye size. This measurement is crucial because it ensures that your frames will fit your eyes perfectly. When measuring the lens, you must do it with a metric tape measure and measure the lenses and not the frames.

How to measure the bridge width?

The bridge width is measured according to the distance between the two lenses. Which means you have to measure from the innermost point of each lens. Once you find the proper bridge measurements for your eyeglass or sunglass, it will stay on your nose securely and it doesn’t slide off.

Measuring the temple length:

The temple length signifies the length of the eyeglasses’ arm pieces. It’s the distance between the arms bend and its meeting point on the frame. The length is usually between 120 and 150 mm. Some common industry standards include 130, 140, and 150 mm. If you are experiencing frequent headaches then it can mean that the eyeglass arms are too tight, and they are not sitting comfortably behind your ears. It’s fine if the arms are of slightly different lengths, you can adjust them. The temple length measurements may not always end in five or zero.

How to measure the lens height?

The lens height is the distance between the top of the frame and the lowest point of the lens. The number depends on the frame style, and it can be crucial when you want to figure out measurements for bifocals or any other progressive lens. In the end, you will only have to worry about lens height if you want any progressive lens. Ensure that the bottom of your frames does not rub against your cheeks.

Another easy measurement you must consider is the frame width. This is the distance between the frame ends, including hinges. This measurement will be quite handy, it will help you know if the frames are too wide or too narrow. Another way to measure frame width is measuring pupillary distance. This number can help if you are looking for progressive lenses, and it will save you from eye strain.

Once you understand all the measurements listed above, then you will find the perfect fit when online shopping for eyeglasses. Finding the right eyewear can speak volumes about your personality. Showcase your fun and practical side by choosing eyeglasses that have stylish frames and functional lenses. You can always refer to a frame size guide to know whether the spectacle is available in your size or not. At Optica, we have a curated collection of trendy eyeglasses and sunglasses. Each pair comes with an eyeglass size chart that will help you find a comfortable fit. Now that you have your measurements, head on over to Optica’s online store to find the impeccable eyeglass for you!