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CAVENIRER / SIZE GUIDE
Find a Frame
Find a Frame
That Fits Right.
Smart eyewear should feel secure, balanced and comfortable. Learn how to compare frame width, lens width, bridge width and temple length before choosing your next Cavenirer smart glasses.
01 / WIDTH
Frame Width
The overall width of the front of the frame is one of the most useful fit references.
02 / LENS
Lens Width
Helps indicate the visual size and scale of the front of the glasses.
03 / BRIDGE
Bridge Width
Influences how the glasses sit and balance across your nose.
04 / TEMPLE
Temple Length
Affects how the arms reach and rest behind your ears.
START WITH WHAT ALREADY FITS
Your Current Glasses
Your Current Glasses
Are the Best Reference.
Choosing eyewear online is easier when you already know the dimensions of a frame that feels comfortable.
Instead of choosing only from Small, Medium or Large labels, compare the actual millimeter measurements of a Cavenirer frame with glasses you already wear.
Overall frame width is often the easiest starting point, but bridge width, lens shape, hinge position, temple design and frame thickness can all influence how two similarly sized frames feel.
Smart eyewear may contain speakers, batteries,
microphones and other electronics inside the temples.
That makes balanced fit especially important:
the frame should feel secure without creating
excessive pressure at the nose or temples.
THE FOUR KEY MEASUREMENTS
Know the Numbers
Know the Numbers
on Your Frames.
Eyewear dimensions are normally listed in millimeters. These four measurements provide a useful starting point when comparing different frames.
01
Frame Width
Measure the full front width from the widest outer point on one side of the frame to the other. This is often the most useful overall fit measurement.
02
Lens Width
Measure horizontally across one lens at its widest point.
03
Bridge Width
Measure the smallest horizontal distance between the two lenses.
04
Temple Length
Measure the arm from the hinge toward the end, following the shape of the temple.
HOW TO MEASURE
Four Simple
Four Simple
Measurements.
STEP 01
Choose a Comfortable Pair
Start with glasses you already wear comfortably. Place them on a flat surface with the front facing upward.
STEP 02
Measure the Front
Measure straight across the widest outer points of the front frame to find overall frame width.
STEP 03
Measure Lens & Bridge
Measure the widest horizontal part of one lens, then measure the narrowest distance between the lenses.
STEP 04
Check the Temple
Measure one temple arm from the hinge toward the tip. Compare it with the Cavenirer product specifications.
GENERAL SIZE REFERENCE
Small, Medium
Small, Medium
or Large?
Use these ranges only as a general reference. Eyewear sizing is not perfectly standardized, and frame shape can change how the same measurements feel.
| General Size | Overall Frame Width | Typical Lens Width | Typical Bridge | Typical Temple |
|---|---|---|---|---|
| Small | Below 135 mm | Approx. 46–50 mm | Approx. 15–18 mm | Approx. 135–140 mm |
| Medium | Approx. 135–140 mm | Approx. 50–54 mm | Approx. 17–20 mm | Approx. 140–145 mm |
| Large | Above 140 mm | Approx. 54 mm+ | Approx. 18–22 mm | Approx. 145 mm+ |
These ranges are approximate and are not universal industry standards.
For the best comparison, use the actual dimensions listed
on the individual Cavenirer product page.
QUICK FIT FINDER
Start With Your
Start With Your
Current Frame.
Enter the overall width of a pair of glasses that already fits you well.
This tool gives you a practical comparison range, not a guaranteed fit. Shape, bridge, temple design and personal preference still matter.
mm
YOUR REFERENCE
Medium / Regular Fit
CHECK THE FIT
What a Good Fit
What a Good Fit
Should Feel Like.
01
Secure, Not Tight
The glasses should remain stable when you move without creating strong pressure at your temples.
02
Comfortable Bridge
The frame should sit naturally on your nose without constant sliding or concentrated pressure.
03
Balanced Temples
The arms should reach comfortably behind your ears without excessive bending or pinching.
04
Level Front
The frame should generally sit level rather than consistently tilting or lifting on one side.
05
Stable During Movement
Normal head movement should not cause the glasses to slide forward excessively.
01 / ORDINARY EYEWEAR
Fit Is Mostly About Comfort and Optics.
Traditional eyewear fit usually focuses on lens position, bridge comfort, temple pressure, overall width and stability.
Those same measurements remain important when choosing smart eyewear.
02 / SMART EYEWEAR
Electronics Add Weight and Structure.
Smart frames may contain batteries, speakers, microphones, controls and Bluetooth components within the temples.
For longer wear, balanced pressure can therefore be more important than simply choosing the smallest frame that feels secure.
GENERAL FACE WIDTH
Narrow, Regular
Narrow, Regular
or Wide?
Overall frame width is often a more reliable starting point than face-shape labels such as round, square or oval.
01 / NARROWER FIT
Small Frames
If comfortable glasses you already own measure below approximately 135 mm overall, begin by comparing narrower Cavenirer frames.
Main reference: under ~135 mm
02 / REGULAR FIT
Medium Frames
If your existing glasses are around 135–140 mm wide, medium-width frames may provide a useful starting point.
Main reference: ~135–140 mm
03 / WIDER FIT
Large Frames
If your comfortable eyewear measures above approximately 140 mm, start by comparing wider frames.
Main reference: above ~140 mm
FIT TROUBLESHOOTING
Signs the Frame
Signs the Frame
May Not Be Right.
01
Strong Temple Pressure
Persistent squeezing at the sides of your head can indicate that the overall frame is too narrow.
02
Frequent Sliding
If the glasses repeatedly slide down your nose, the bridge, frame width or balance may not suit you.
03
Arms Flare Out Excessively
Temples that spread sharply outward can be a sign that the front frame is too narrow.
04
Frame Feels Unstable
Excessive movement when looking down or turning your head may indicate a fit that is too loose or poorly balanced.
05
Nose Pressure
Concentrated discomfort at the bridge can indicate that the bridge shape or width is not well matched.
SIZE GUIDE FAQ
Common
Common
Questions.
Overall frame width is often the easiest starting point
because it gives you a quick indication of whether
the front of the glasses is likely to feel narrow,
regular or wide.
Individual product pages should provide the available
dimensions for that model. Compare them with glasses
you already wear comfortably.
No. Smart glasses should feel secure,
but they should not need to squeeze your head.
Balanced fit is important because some smart frames
can be heavier than conventional eyewear.
Yes. Bridge width, hinge position,
frame thickness, overall width and temple shape
can make two frames feel very different
even when their lens width is identical.
Face shape can be useful for style preferences,
but actual measurements are normally more useful
for predicting physical fit.
Start with a pair you already wear comfortably.
Compare the exact dimensions rather than relying only
on the Small, Medium or Large label.
If both are close, consider bridge width,
temple length, frame shape and whether you prefer
a more secure or more relaxed fit.
No. It provides a useful comparison range based on
an existing frame that already fits you.
Final comfort still depends on the product's
shape, bridge, temples and your personal preferences.
MORE BUYING HELP
Explore More Cavenirer Guides.
READY TO COMPARE?
Find Smart Eyewear
Find Smart Eyewear
That Fits Your Routine.
Check the measurements on each product page, compare them with eyewear you already find comfortable, then choose the frame that best matches your fit and smart-feature needs.
CAVENIRER
Smart Eyewear for Everyday Life
COMPANY
Guangzhou Kaihang Eyewear Co., Ltd.
广州开航眼镜有限公司
CUSTOMER SUPPORT
Room 201, No. 2-1, Yingcai Street,
Tianhe District, Guangzhou,
Guangdong, China