Persol Sunglasses (PO2931S) Composite plastic frame plastic lens non-polarized Bridge: 17 millimeters Arm: 140 millimeters Model name: 2931/S Plastic frame, Tempered Glass Grey lenses Size (mm) Lens: 53 - Nose: 17 - Bars: 140 Rx-able: this product can fit prescription lenses in most cases