Frame Size Guide – Find Your Perfect Eyeglasses Fit
Choosing the right frame size is important for comfort, appearance and clear vision. Use this ARN Optical frame size guide to understand eyeglass measurements and find frames that fit your face comfortably.
How to Choose the Right Eyeglass Frame Size
The right eyeglasses should feel comfortable without being too tight or too loose. Frame size is generally determined by three main measurements: lens width, bridge width and temple length. These measurements are usually printed inside the temple arm of your existing glasses.
If you already own a comfortable pair of glasses, check the numbers printed on the inside of the frame. For example, a frame marked 52-18-140 generally means 52 mm lens width, 18 mm bridge width and 140 mm temple length.
Understanding Eyeglass Frame Measurements
Eyeglass Frame Size Chart
```Use the following chart as a general starting point. Face shape, frame design and personal preference can also affect the best fit.
| Frame Size | Lens Width | Typical Fit | Recommended For |
|---|---|---|---|
| Small | 45–49 mm | Compact | Small faces / children |
| Medium | 50–54 mm | Balanced | Most average faces |
| Large | 55–59 mm | Roomier | Larger or wider faces |
| Extra Large | 60 mm+ | Wide | Extra-wide faces |
Note: These size ranges are general guidelines. Frame dimensions can vary between different shapes and manufacturers.
How to Measure Your Glasses at Home
Don't know your frame size? You can measure an existing pair of comfortable glasses using a ruler with millimetre markings.
1. Measure Lens Width
Measure horizontally across one lens from the left edge to the right edge. Record the measurement in millimetres.
2. Measure Bridge Width
Measure the distance between the two lenses across the nose bridge area.
3. Check Temple Length
Measure the frame arm from the hinge to the end of the temple. Many frames show this number directly on the arm.
How Should Your Glasses Fit?
✓ Comfortable on Your Nose
The bridge should sit comfortably without excessive pressure or constantly sliding down your nose.
✓ Eyes Should Be Well Positioned
Your eyes should appear reasonably centered within the lenses for a comfortable and natural-looking fit.
✓ Temples Should Feel Secure
The temple arms should rest comfortably along the sides of your head without causing uncomfortable pressure.
✓ Frame Should Not Slide Easily
A properly fitted frame should remain reasonably stable during normal daily activities.
Choose Frames According to Your Face Shape
Round Face
Square and rectangular frames can create contrast and add definition to softer facial features.
Square Face
Round or oval frames can provide contrast against stronger angular facial features.
Oval Face
Many frame shapes can work well with an oval face. Choose a size that feels balanced with your facial width.
Heart-Shaped Face
Lightweight, oval or softer frame designs may create a balanced look.
Shop Eyeglasses by Frame Style
Once you know your approximate frame size, explore different styles at ARN Optical.
Ready to Find Your Perfect Frame?
Explore stylish and comfortable eyeglasses from ARN Optical and choose a frame that matches your size, style and everyday needs.
Shop EyeglassesFrame Size Guide – Frequently Asked Questions
How do I know my eyeglass frame size?
Check the numbers printed inside the temple arm of your existing glasses. They commonly show lens width, bridge width and temple length.
What does 52-18-140 mean on glasses?
Generally, 52 means the lens width, 18 means the bridge width and 140 means the temple length, all measured in millimetres.
What is a medium-size eyeglass frame?
Medium frames commonly have a lens width around 50–54 mm, although frame proportions and design can vary.
Should my eyeglasses be wider than my face?
Generally, the frame should look balanced with your face and should not be excessively wider than your facial width. Comfort and proper fit are more important than following one exact measurement.
Can I use my old glasses to choose a new frame?
Yes. If your existing glasses fit comfortably, their measurements can provide a useful starting point when selecting a new frame.
What if I am between two frame sizes?
Compare the measurements of your current comfortable glasses with the new frame. Consider both frame width and bridge size rather than choosing based only on lens width.
Find the Right Size Before You Buy Glasses Online
Buying eyeglasses online becomes easier when you understand frame measurements. Compare your existing glasses with the dimensions listed on the product page, consider your face width and choose a frame that provides a comfortable fit.
At ARN Optical, you can explore different frame styles, including full-rim, half-rim, rimless, men's, women's and kids' eyeglasses. Use this frame size guide as a helpful starting point before placing your order.