Photo by cottonbro studio / Pexels
Understanding Frame Measurements
Photo by cottonbro studio / Pexels
Every glasses frame has 3 numbers printed on the inside of the temple arm, e.g. 52□18-140. These represent, in millimeters:
- Lens Width: The horizontal width of one lens, measured at its widest point. Typically ranges from 40-62mm.
- Bridge Width: The distance between the two lenses, resting on your nose. Typically ranges from 14-24mm.
- Temple Length: The length of the arm from hinge to tip, that goes over your ear. Typically ranges from 120-150mm.
Photo by RDNE Stock project / Pexels
Find Your Frame Size
Photo by RDNE Stock project / Pexels
Tip: Measure face width from the outer edge of one cheekbone to the other, or across your temple at the widest point.
Photo by RDNE Stock project / Pexels
Frame Size Chart
Photo by RDNE Stock project / Pexels
| Category | Face Width | Lens Width | Bridge | Temple |
|---|---|---|---|---|
| Small | < 129 mm (5.1") | 40-46 mm | 14-18 mm | 120-135 mm |
| Medium | 129-139 mm (5.1-5.5") | 47-52 mm | 18-20 mm | 135-145 mm |
| Large | > 139 mm (5.5") | 53-62 mm | 20-24 mm | 140-150 mm |
Photo by MART PRODUCTION / Pexels
Face Shape → Frame Style Guide
Photo by MART PRODUCTION / Pexels
Photo by Владимир Высоцкий / Pexels
Oval
Photo by Владимир Высоцкий / Pexels
Most frame styles work well. Try to maintain the natural balance with frames as wide as the broadest part of your face — geometric or walnut shapes are great.
Photo by Ksenia Chernaya / Pexels
Round
Photo by Ksenia Chernaya / Pexels
Angular, rectangular, or geometric frames add definition and make the face appear longer and slimmer. Avoid round frames that echo your face shape.
Photo by HamZa NOUASRIA / Pexels
Square
Photo by HamZa NOUASRIA / Pexels
Round or oval frames soften strong jawlines and angles. Rimless or thin-frame styles also work well to reduce visual bulk.
Photo by Viktoria Slowikowska / Pexels
Heart
Photo by Viktoria Slowikowska / Pexels
Frames wider at the bottom, like cat-eye or light-colored rimless styles, balance a narrow chin against a broader forehead.
Photo by Shimaa Mohamed / Pexels
Oblong
Photo by Shimaa Mohamed / Pexels
Tall frames with strong decorative or contrasting temples add width, making the face appear shorter and more balanced. Oversized frames also work well.
Additional Fit Tips
- Bridge fit matters most: If glasses slide down your nose, the bridge width is too wide. If they pinch, it's too narrow.
- Temple length affects comfort: Too short and they'll press behind your ears; too long and they won't stay put.
- When between sizes, prioritize lens width over overall frame width since it affects both fit and how your eyes are centered in the lens.
- Try adjustable nose pads if you have a narrow or flat nose bridge for a more custom fit.
- Always try before buying when possible — online sizing is a great starting point, but comfort varies by face structure.