How to Measure for Eyeglass Frames: A Quick Guide

Finding the perfect pair of glasses starts with the right measurements. Ill-fitting Frames can cause discomfort, slip off your nose, or even affect your vision. Here's a simple guide to measuring your face for the ideal fit.

Key Measurements

Eyeglass Frames are labeled with three numbers (e.g., 52-18-140), which stand for:

Lens Width – Horizontal width of one lens (in mm).

Bridge Width – Distance between lenses (in mm).

Temple Length – Arm length from hinge to tip (in mm).

How to Measure Yourself

What You'll Need

A millimeter ruler

A mirror (or a helper)

1. Pupillary Distance (PD)

This is the distance between your pupils, crucial for proper lens alignment.

Stand 8 inches from a mirror, hold the ruler just below your eyes.

Close your right eye, align the ruler’s "0" with your left pupil.

Open your right eye, close your left, and note the measurement at your right pupil.
Average adult PD: 54-74mm

2. Face Width

Measure across your face from temple to temple where glasses sit.

3. Bridge Width

Measure the distance between your eyes at the narrowest part of your nose.

4. Temple Length

Measure from your ear to where the temple meets the frame.

Choosing the Right Size

Face Shape    Best Frame Style    Fit Tips
Round    Rectangular/Angular    Wider lenses (≥52mm)
Square    Round/Oval    Medium bridge (17-19mm)
Oval    Most shapes    Balanced proportions
Heart    Bottom-heavy frames    Avoid oversized styles

Pro Tips

✔ Try before buying – Sizes vary by brand, so test different fits.
✔ Adjustable frames – Metal frames can be bent for a snug fit.
✔ Online shopping? Use virtual try-on tools and check return policies.

Final Thoughts

Getting the right measurements ensures comfort and optimal vision. If you have a strong prescription or unique facial features, consult an optician for the best fit.

Now you're ready to find your perfect pair! Any questions? Drop them below. 👓