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 Measurement Converter
Calculate and understand glasses frame measurements: eye size, bridge width, and temple length. Fast, free, and 100% private. All processing happens locally.
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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.
3
Save Your Output
Click the download or copy button to export your results to your device or clipboard.
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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