Clothing & Wearables calculator
What Sunglasses Size Do I Need?
Enter temple-to-temple face width, nose bridge width, and frame fit to work out sunglasses frame-width and bridge target.
Enter your measurements
The key to what sunglasses size do i need is having the right measurements: temple-to-temple face width, nose bridge width, and frame fit. This recommended-dimensions calculation uses them to return sunglasses frame-width and bridge target in a form you can compare directly.
- Temple-to-temple face width — Required
- Nose bridge width — Required
- Frame fit — Required
Sunglasses frame-width and bridge target
Enter the measurements above to calculate sunglasses frame-width and bridge target.
How the calculation works
V16 calculation: fitAdjustment={narrow:-0.005,standard:0,wide:0.005}; targetFrameWidth=faceWidth+fitAdjustment[fitPreference]; targetBridgeWidth=bridgeWidth. Canonical CMS units are used for numeric constants.
Worked example
Example: Temple-to-temple face width = 14.2 cm; Nose bridge width = 1.8 cm; Frame fit = standard. Result: Target Bridge Width = 1.8 cm; Target Frame Width = 14.2 cm.
Before you decide
Recheck the limiting measurement before purchase or installation. This page calculates the stated geometry or quantity only; product-specific construction or installation details can still affect the final choice. For what sunglasses size do i need, the limiting result on this page is sunglasses frame-width and bridge target.
Direct measurement/geometry calculation. No external reference is required for the arithmetic itself; the result is derived only from the user-entered measurements and the formula stored in calculationLogicJson.
Frequently asked questions
How does the Sunglasses Size | Size Guide calculator work?
It uses fitAdjustment={narrow:-0.005m,standard:0m,wide:+0.005m}; targetFrameWidth=faceWidth+fitAdjustment[fitPreference]; targetBridgeWidth=bridgeWidth. The result is sunglasses frame-width and bridge target.
Which measurements or specifications do I need?
Use these inputs: Temple-to-temple face width, Nose bridge width, Frame fit. Measure or copy the values from the exact product/specification rather than guessing.
Is the result a guarantee that the product will fit or be suitable?
No. The calculator answers the stated sunglasses frame-width and bridge target question. Manufacturer instructions, safety rules, certification, installation tolerances or brand-specific size charts can impose additional requirements.