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Glasses Frame Sizes and Measurements: A Complete Guide

Glasses Frame Sizes and Measurements: A Complete Guide

While glasses serve an important function, the right pair can also be a stylish accessory. Because every individual has a unique face shape and features, a standard glass frame size won't work for everyone. This is why it's important to choose the right frame size and shape to ensure both comfort and style.

If you already have a pair of glasses that fit you perfectly but need to be replaced, you can check the frame measurements and order the same size. If your frame measurements aren't printed on your current eyeglasses, there are still ways for you to measure your glasses and find the right fit.

Deciphering Frame Dimensions: The Basics

All eyeglasses are measured in millimeters (mm) and are typically written on the inside of a pair of glasses. The measurement is usually three numbers, which each measure different parts of the frames, and are separated by dashes. You can expect to see two two-digit numbers and one three-digit number. These numbers list the lens width, bridge width and temple length.

Every pair of glasses is different, which means the location of these measurements can vary. Some common areas where the measurements are usually printed are on the inside of the frames on the temple arm, nose bridge or earpiece.

These dimensions are important because even if the numbers are just slightly off, it can impact how the glasses fit and look on your face. Keep in mind that if you're using a pair of sunglasses as a comparison for size, the measurements may not be accurate for eyeglasses because these types of eyewear are each designed to fit slightly differently.

Understanding Frame Measurements

Once you've located the frame measurements, the numbers from left to right will tell you the lens width, bridge width and temple length. There are a total of five measurements that are often used to determine the right frame measurement:

  1. Lens width: The lens width, sometimes called the eye size, ranges from 40mm to 60mm. It measures the horizontal width of the lens at the widest point, determining how large of a clear lens you'll have to look through.
  2. Bridge width: The bridge length ranges from 14mm to 24mm and is the distance in between the two lenses. This measurement is the shortest distance between the lens and is where the frames come together against your nose.
  3. Temple length: Temple length, which is usually 120mm to 150mm long, is essentially the “arm length" of the frame. This is the measurement from the screw that attaches to the frame all the way to the part that goes behind the ear.
  4. Frame width: The frame width, which measures the horizontal size of the front frames, ranges from 125mm to 150mm. This measurement extends to the furthest ends, which is usually from one end piece to the other.
  5. Lens height: The lens height, or vertical height, is measured from 32mm to 38mm. It extends from the lowest to the highest point on the lens.

How to Measure for Glasses: A Step-by-Step Guide

The size and shape of the glasses you choose can have an impact on your appearance. The perfect frame size can complement your features and make you feel more confident each time you wear your glasses.

Not sure where to begin? Here are a few tips to help you find the perfect frame size for your face shape:

  • Consider your face shape: Depending on if you have a square, oval or round face shape, different frame shapes will suit your features better than others. While it can be tempting to go with the most popular frame shape, it may not necessarily complement your features the best. Frame sizes can range from square to cat-eye. When choosing, look for pairs that highlight your individual features and keep your eyes centered in the lens.
  • Pick the right frame size: Frames also come in various sizes. If the frame is too wide, it could make your eyes and face look more narrow and close together. If the frame is too narrow, it can make your face look wider than it really is. Ideally, you want to find a frame that's just slightly wider than your face for the best fit.
Tools You Need to Measure Your Glasses

Tools You Need to Measure Your Glasses

Since glasses are measured in millimeters (mm), you'll need to use a ruler or measuring tape that has mm measurements. Once you have that, here's how to measure each area so you can get the right fit:

  • Frame width: To obtain the frame width, which isn't a measurement that's usually printed on glasses, you'll need to take your measuring tape and run it across the front of the frames horizontally at the widest point. Make sure to include any decorative features or hinges that stick out from the side so that you obtain the widest measurement.
  • Temple length: First, measure the temple length by running your tape from the hinge to where it starts to curve. Then, run the tape from the curve to the end of the temple arm and add both of those measurements together.
  • Nose bridge: For the nose bridge, you'll measure horizontally at the top of the bridge from one end to the other. Make note of how many millimeters are between the nearest points.
  • Lens height: The lens height is measured vertically at the highest point. This measurement is essentially the tallest part of the lens.
  • Lens width: For the lens width, you'll want to measure horizontally across the widest part of the lens. When you take this measurement, you don't want to include the frames.

Finding the Right Fit for Glasses at Eyemart Express

At Eyemart Express, we are committed to helping you find your perfect glasses size with ease and precision. For over 30 years, we've been improving lives by helping people see better. We understand how important it is for you to be able to see clearly. This is why our team of experts has the knowledge and training to help you find the right fit — in a short amount of time.

Our in-store customer service team will care for you personally and serve as a resource for finding the right lens type and fit. Even once you find a new pair of glasses, our team will always be available to help and answer any questions you may have.

Finding the Right Fit for Glasses at Eyemart Express
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