When shopping for eyewear online, the numbers printed on a frame can tell you a lot about how it may fit.
You may have seen measurements like 49-22-140, 52-21-140, or 55-19-140 listed on a product page. These numbers are not random. They are frame measurements, usually shown in millimeters, and they help describe the size and proportions of the frame.
At Lumira Eyewear, we include frame measurements to help you shop with more confidence before choosing a pair.
What does 49-22-140 mean?
A frame measurement like 49-22-140 usually breaks down into three parts:
49 = Lens width
22 = Bridge width
140 = Temple length
Each number gives you a different fit clue.
Lens width
The first number is the lens width. This measures the width of one lens from side to side.
For example, in a 49-22-140 frame, the 49 means each lens is approximately 49 mm wide.
A smaller lens width can create a more compact or refined fit. A larger lens width may give the frame a wider or more oversized look.
Bridge width
The second number is the bridge width. This measures the distance between the two lenses, across the part of the frame that sits near your nose.
In a 49-22-140 frame, the 22 means the bridge is approximately 22 mm wide.
Bridge width matters because it can affect how the frame sits on your face. A bridge that is too narrow may feel tight, while a bridge that is too wide may sit lower or feel less secure.
Temple length
The third number is the temple length. This measures the arm of the frame, from the hinge to the end tip that rests behind your ear.
In a 49-22-140 frame, the 140 means the temple length is approximately 140 mm.
Most adult eyewear falls around 135 mm to 145 mm in temple length, depending on the frame style and fit.
Why measurements matter when shopping online
Frame measurements help give you a better idea of scale, especially when you cannot try the frame on in person.
They can help you compare a new frame to a pair you already own and love. If your current favorite sunglasses are close to 49-22-140, another frame with similar measurements may feel familiar in size.
Measurements are not the only thing that affects fit. Frame shape, material, nose pads, lens height, and face shape all matter too. But measurements are a helpful starting point.
How to use measurements before buying
If you already own a pair of glasses or sunglasses that fits well, check the inside of the temple arm. Many frames have measurements printed there.
Then compare those numbers to the frame you are considering.
You do not need an exact match. A few millimeters can still feel wearable depending on the frame shape. But comparing measurements can help you avoid choosing a frame that is much smaller or larger than what you prefer.
A quick Lumira fit example
Our JADE Silver Ocean Blue sunglasses measure 49-22-140 mm.
That means they have a 49 mm lens width, a 22 mm bridge, and a 140 mm temple length. JADE has a polished round shape with a lightweight feel, making it best suited for small to medium face sizes or customers who prefer a refined round sunglass that does not feel heavy.
The Lumira approach
Every Lumira frame is selected with fit, comfort, and everyday wearability in mind. We include measurements, fit guidance, lens details, and what comes with each order so you can shop with more confidence.
When in doubt, start with the measurements of a frame you already like, then compare from there.
Shop Lumira sunglasses and optical frames to find a pair that fits your style, your face, and your everyday routine.
