Find the perfect sunglasses size for maximum UV protection and comfort. Measure your face or check your current frames.
Enter your face measurements below to find your recommended sunglasses size.
Enter the measurements from your current or potential sunglasses to see if they fit.
Refer to this standard sizing chart when shopping for sunglasses. Measurements are in millimeters (mm).
| Size | Lens Width | Bridge Width | Temple Length | Face Width |
|---|---|---|---|---|
| Small | < 50 mm | 14-16 mm | 120-135 mm | < 125 mm |
| Medium | 50-54 mm | 16-18 mm | 135-145 mm | 125-140 mm |
| Large | > 54 mm | 18-21 mm | 145-155 mm | > 140 mm |
Frame measurements are usually printed on the inside of the temple arm. They appear as three numbers separated by dashes or squares, e.g., 52 â 18 â 140. The first number is the lens width (52 mm), the second is the bridge width (18 mm), and the third is the temple length (140 mm).
Use this guide to match your face width measurement to the ideal sunglasses size:
Face width: Less than 125 mm
Best size: Small frames
Lens width: Under 50 mm
Look for narrow frames that won't overwhelm your features.
Face width: 125-140 mm
Best size: Medium frames
Lens width: 50-54 mm
The most common size â suits most face shapes.
Face width: Over 140 mm
Best size: Large frames
Lens width: Over 54 mm
Choose wider frames for balanced proportions.
Try round or oval frames to soften angular features. Aviator and wayfarer styles work well too.
Angular or geometric frames (square, rectangular, cat-eye) add structure and definition.
Bottom-heavy frames or aviators balance a wider forehead. Look for lighter colors on top.
Most frame shapes work with oval faces. Experiment with bold styles and oversized shapes.
Choosing the right sunglasses size is about much more than aesthetics â it directly affects your eye health, comfort, and the level of UV protection you receive. Sunglasses that are too small leave gaps around the edges, allowing harmful ultraviolet (UV) rays to reach your eyes from the sides. Frames that are too large may slide down your nose, creating an inconsistent level of coverage and causing frequent adjustments throughout the day.
The three key measurements â lens width, bridge width, and temple length â work together to determine how well a pair of sunglasses will fit your face. When all three measurements are proportional to your facial dimensions, the sunglasses sit comfortably, stay in place during activity, and provide consistent protection from UV radiation, glare, and environmental debris.
According to the American Academy of Ophthalmology, sunglasses should block 99-100% of both UVA and UVB radiation. A proper fit ensures that this protection extends to the delicate skin around your eyes and reduces the risk of long-term eye damage, including cataracts, macular degeneration, and photokeratitis (sunburn of the eye).
Every pair of quality sunglasses has its measurements printed on the inside of the temple arm, typically in the format: 52 â 18 â 140. You'll need to understand these numbers:
Getting accurate face measurements is the first step toward finding sunglasses that fit perfectly. Here's a simple guide to measuring your face at home using just a soft measuring tape or a ruler and string.
Stand in front of a mirror and measure the distance between the outer edges of your face at cheekbone level, just below your eyes. This is your key measurement for determining frame size.
Measure the distance between your pupils, or the width of the bridge of your nose where the sunglasses would rest. This helps determine the ideal bridge width.
Measure from the hinge point (where the temple connects to the frame front) to the curve behind your ear. Your temple length preference depends on how far back you want the arms to extend.
If you already own a pair that fits well, check the numbers printed on the inside of the temple. Use those measurements as your starting reference point for future purchases.
Once you have your measurements, use our Face Measurement tab above to get an instant recommendation for your sunglasses size, or use the Frame Fit Check tab to evaluate a specific pair of sunglasses you're considering.
While measurements ensure a proper physical fit, your face shape determines which frame styles will look best on you. The goal is to create visual balance by choosing frames that contrast with your natural face shape.
Square faces benefit from round or oval frames that soften angular jawlines. Round faces look best with angular, geometric frames that add definition. Heart-shaped faces (wider forehead, narrower chin) pair well with aviator or bottom-heavy frames. Oval faces are the most versatile and can carry nearly any frame style.
Keep in mind that the size of the frame should still match your face width â even the most flattering style will look off if it's the wrong size. Use our calculator to determine your frame size first, then explore styles within that size range. Many sunglass manufacturers produce the same popular styles across multiple sizes, so finding a flattering frame that also fits correctly is easier than ever.
â ī¸ Important Note: This Sunglasses Size Calculator provides general recommendations based on standard sizing conventions. Actual fit may vary between brands and frame styles. We recommend trying on sunglasses whenever possible and using these measurements as a starting guide. For prescription sunglasses, always consult with your optician for the most accurate fit. Sunglasses are not a substitute for proper eye protection in hazardous environments â always use appropriate safety eyewear for sports and industrial activities.