Ever picked up a pair of sunglasses that looked perfect but felt too tight, too loose, or just slightly off? Fit matters just as much as style. This guide shows you how to find your sunglasses size, decode the numbers printed inside every frame, and choose a pair that actually fits.
What Do the Numbers on Your Sunglasses Mean?
Every pair of sunglasses has a small code printed on the inside of the temple arm (the part that rests behind your ear). It usually looks something like this: RB2132 NEW WAYFARER 901 52□18 3N. Here’s what each part tells you:
- Frame code — the model number, unique to that specific frame (e.g. RB2132).
- Frame name — the style name (e.g. New Wayfarer).
- Colour code — a number identifying the exact frame and lens colour combination.
- Lens size — the three numbers that define the physical fit of the frame.
Understanding Lens Size: The Three Key Measurements
The three numbers in the code (for example, 52□18-145) refer to specific measurements, all in millimetres:
- Lens width — the horizontal diameter of each lens. Typical widths range from 47–64mm.
- Bridge width — the distance between the two lenses, where the frame sits on your nose. Typical widths are 12–22mm.
- Temple length — the length of the arms, from hinge to tip. Typical lengths are 125–150mm.
How to Check Your Own Sunglasses Size
If you have a pair of sunglasses that already fits you well, check the code printed inside the arm and use those measurements as your benchmark for future purchases.
If you’re starting from scratch, here’s how to estimate your fit:
- Lens width: Should roughly match the widest part of your eye area without extending past your face.
- Bridge width: The frame should sit comfortably on your nose without pinching or sliding down.
- Temple length: The arms should reach comfortably behind your ears without excessive pressure or gaping.
Signs Your Sunglasses Don’t Fit Properly
- They slide down your nose regularly
- They pinch at the temples or behind the ears after short wear
- There’s visible gapping between the frame and your face
- The lenses sit too close to your eyelashes, or too far from your eyes
- You get headaches or pressure marks after wearing them
If any of these sound familiar, it’s worth trying a different size — even within the same style, many frames come in standard and large fits.
Fit and Face Shape Work Together
Size is only half the story — style matters too. Once you know your ideal measurements, pair them with the right frame shape for your face. See our full sunglasses for your face shape guide to find styles that suit you, then use this sizing guide to confirm the fit is right.
People Also Ask — Sunglasses Sizing
How do I find my sunglasses size?
Check the code printed on the inside of the temple arm — it shows lens width, bridge width, and temple length in millimetres. If a pair fits you well, use those numbers as your reference for future purchases.
What does the code on the inside of my sunglasses mean?
It typically includes the frame code, frame name, colour code, and three sizing numbers representing lens width, bridge width, and temple length, all in millimetres.
What is a good bridge width for sunglasses?
Most adults fall between 12–22mm bridge width, depending on nose shape and frame style. The right bridge width means the frame sits comfortably without pinching or sliding.
Why do my sunglasses keep sliding down my nose?
This usually means the bridge width is too wide for your nose, or the frame is generally too large. Trying a narrower bridge width or a smaller overall frame size often solves this.
Do sunglasses come in different sizes for the same style?
Yes, many popular styles are available in standard and large fits, so you can find the same look in a size that suits your face better.
Find Your Perfect Fit at Oculux
Now you know how to read the code and find your ideal size. Browse our full sunglasses range at Oculux, or pair this guide with our face shape guide to find both the right style and the right fit. Still unsure? WhatsApp our team at +27 66 039 7795 and we’ll help you choose.