What Do Sunglasses Size Numbers Actually Mean? My Experience Explained

I used to think buying sunglasses was simple - just pick a style you like and you're done. But after years of ending up with pairs that looked great on the rack but terrible on my face, I finally decided to learn what those mysterious numbers on sunglasses actually mean.

The Confusion That Started It All

I was shopping online for a new pair of sunglasses when I noticed sizes like "54-18-140" listed in the product details. I had no idea what these numbers meant. Were they some kind of model number? A color code? I felt completely lost trying to use any kind of eyewear size chart.

After some research and asking around in online communities, I finally cracked the code. And honestly, once you understand it, choosing the right sunglasses becomes so much easier.

Breaking Down the Three Numbers

Every pair of quality sunglasses has three key measurements. Here's what I learned:

Lens Width (First Number)

The first number represents the width of each lens in millimeters. For example, if you see "54" as the first number, each lens is 54mm wide. This is probably the most important number for determining if sunglasses will fit your face properly.

Small faces typically need lens widths of 50mm or less

Medium faces usually fit well with 51-54mm lenses

Larger faces often need 55mm or wider

Bridge Width (Second Number)

The second number is the bridge width - the distance between the two lenses where the frame sits on your nose. This measurement is crucial for comfort. If the bridge is too narrow, the sunglasses will pinch. If you adored this information and you would like to receive additional details regarding Mozaer Eyeglasses kindly browse through the website. Too wide, and they'll slide down constantly.

I have a wider nose bridge, so I learned to look for sunglasses with bridge measurements of 18mm or more. This single discovery eliminated most of my fitting problems.

Temple Length (Third Number)

The third number indicates the length of the temple arms - the parts that go over your ears. Standard temple lengths range from 135mm to 150mm. If you have a larger head like I do, you'll want to look for longer temples to ensure a comfortable fit.

Why This Matters for Online Shopping

Understanding these measurements transformed my online shopping experience. Before, I would order sunglasses based purely on how they looked in photos, only to be disappointed when they arrived. Now I always check the glasses size guide and compare it to pairs I already own that fit well.

My advice? Measure a pair of sunglasses or glasses that currently fit you perfectly. Write down those three numbers and use them as your reference point for all future purchases.

The Polarized Lens Question

While learning about sizing, I also discovered the importance of polarized lenses. One piece of advice I kept seeing was: "Please get polarized whenever possible." After trying both polarized and non-polarized sunglasses, I have to agree. The difference in glare reduction, especially when driving or near water, is remarkable.

Finding Your Perfect Fit

Here's the process I now follow when shopping for sunglasses:

Measure my current well-fitting sunglasses

Look for similar measurements in new pairs

Consider my face shape when choosing styles

Always check if polarized options are available

Read reviews about fit from people with similar face shapes

Styles Every Person Should Consider

Through my research, I came across advice suggesting that having variety in your sunglasses collection is worthwhile. The recommendation was to have at least a few different styles for different occasions - something classic like aviators or wayfarers, and something more sporty for outdoor activities.

The key is making sure each style fits properly using the sizing system I described above.

My Final Takeaway

Learning to read sunglasses sizes was one of those small discoveries that made a big difference in my life. No more guessing, no more returns, and no more sunglasses that look great in the store but awful on my face.

If you've been struggling to find sunglasses that fit, take a few minutes to understand the sizing system. Measure what works for you, and use those numbers as your guide. It's a simple change that will save you time, money, and frustration.