Opticals99
Frame Size Guide
Last updated: 26 March 2026
Reading Frame Measurements
Every pair of glasses has three numbers printed on the inside of the temple arm. For example: 52-18-140
52
Lens Width (mm)
Horizontal diameter of one lens
18
Bridge Width (mm)
Distance between the two lenses
140
Temple Length (mm)
Length of arm from hinge to tip
Frame Size Chart
- Narrow Fit: Lens Width 48–50 mm — ideal for narrow or small faces.
- Standard Fit: Lens Width 51–54 mm — suits most face widths.
- Wide Fit: Lens Width 55–58 mm — best for wider or larger faces.
Frames by Face Shape
🟡
Round Face
Go for rectangular or angular frames to add definition and contrast.
🟥
Square Face
Choose oval, round, or aviator styles to soften sharp features.
🥚
Oval Face
Most styles work. Try geometric or wide frames for variety.
🫀
Heart-Shaped Face
Select cat-eye or bottom-heavy frames to balance a wider forehead.
Still unsure?
WhatsApp our fitment advisors at +91 9999999999. Send us a selfie holding a standard ID card next to your face and we'll calculate your size — for free!