Optical frames are sized with three critical numbers, usually printed inside the temple arm. Our Eyewear Size Guide helps you decode these measurements: the Lens Width, Bridge Width, and Temple Length. Understand how these dimensions affect the total frame width and ensure your next pair of glasses or sunglasses fits comfortably on your face without sliding or pinching.
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Eyewear Size Converter
Understand and calculate glasses frame measurements for a perfect fit.
Frame Specification Calculator
Look for these three numbers (e.g., 52 □ 18 140) usually printed on the inside of the left temple arm or bridge.
Estimated Total Frame Width130 mm
Medium Fit
What do the numbers mean?
- • **Eye Size:** Width of one lens (usually 40 - 62mm).
- • **Bridge Width:** Distance between the lenses (usually 14 - 24mm).
- • **Temple Length:** Length of the arms (usually 120 - 150mm).
Sizing Secret
Your **pupillary distance (PD)** is also crucial for optical clarity, but frame size is strictly about how the glasses sit on your face.
About Eyewear Measurement Converter
1
Check Frame
Look for three numbers on the inside of the temple (e.g., 52-18-140).
2
Input Details
Enter these to understand the total frame width.
Key Features
Optical Code Decoder
Explains the standard '52-18-140' format used by opticians worldwide.
Total Frame Width Calculator
Estimates the exterior width of the glasses based on internal lens and bridge specs.
Fit Advice
Provides guidance on choosing the right bridge width for different nose bridge types.
Frequently Asked Questions
The bridge width, which is the distance between the two lenses (usually 16-21mm).
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