Size = lens width – bridge – temple length, in mm (e.g. 50-23-145). Lens width is the number to match with your current frames.
Eyewear Size Guide
Understanding your eyewear measurements ensures a proper, comfortable fit. Most frames list their measurements inside the arm in this format:
50 ▢ 18 – 140
Lens Width ▢ Bridge Width – Temple Length (all in millimeters)
Eyeglass Measurement Breakdown
| Measurement | Description | Typical Range |
|---|---|---|
| Lens Width | Horizontal width of one lens | 48–55 mm |
| Bridge Width | Distance between the lenses | 16–22 mm |
| Temple Length | Length of the arm piece | 135–150 mm |
| Lens Height | Vertical height of the lens (important for sunglasses) | 30–45 mm |
| Frame Width | Total width across the front of the frame | 120–145 mm |
General Fit Recommendations
| Size | Lens Width | Bridge | Temple | Best For |
|---|---|---|---|---|
| Small | Under 49 mm | 16–18 mm | 135–140 mm | Narrow faces |
| Medium | 50–54 mm | 17–20 mm | 140–145 mm | Most adults |
| Large | 55-59 mm | 18–22 mm | 145–150 mm | Wider faces |
| Oversize | Over 60 mm | 18–22 mm | 145–150 mm | Wider faces |
If you need help selecting the perfect frame size, our team is always happy to assist.
100% authentic designer eyewear — brand new, with all original accessories
Free U.S. shipping on orders over $150 · Ships in 1–2 business days
14-day returns · Questions? Call 800-515-8523
Estimated Shipping Widget will be displayed here!
Description
Nike CIRCUIT N IU3331X Sunglasses feature injected propionate rectangular frames for a sleek, modern look.
Designed for men, these sunglasses work well for both casual and formal settings.
Beverly Hills Eyewear guarantees 100% authentic, new products with original accessories and no defects.
Details:
- Style Name: NIKE CIRCUIT N IU3331X
- Designer: Nike
- Gender: Men
- Frame Style: Rectangular
- Frame Material: Injected propionate
- Country of Origin: China
Beverly Hills Eyewear is a leading North American distributor offering authentic designer eyewear with consistent quality.
Description
Nike CIRCUIT N IU3331X Sunglasses feature injected propionate rectangular frames for a sleek, modern look.
Designed for men, these sunglasses work well for both casual and formal settings.
Beverly Hills Eyewear guarantees 100% authentic, new products with original accessories and no defects.
Details:
- Style Name: NIKE CIRCUIT N IU3331X
- Designer: Nike
- Gender: Men
- Frame Style: Rectangular
- Frame Material: Injected propionate
- Country of Origin: China
Beverly Hills Eyewear is a leading North American distributor offering authentic designer eyewear with consistent quality.