SIZING INFORMATION: This frame size is S with a hinge to hinge measurement of 128 mm. Ideal for narrow to average faces. FRAME FEATURES: OO9238 Fives Squared sunglasses for men deliver a sleek square design for everyday and sport use. Lightweight polished black O-Matter frame with 8.75 base lens geometry and HDO. Grey lenses ideal for all-day use. LENS FEATURES: Plutonite lenses offer impact resistance and 100% UV protection (UVA, UVB, UVC, and blue light up to 400nm). GREY LENSES are designed for use in all bright light conditions making them great, all purpose lenses. Light transmission: 16% O MATTER FRAME & HIGH DEFINITION OPTICS (HDO): Oakley's lightweight, stress-resistant O-Matter frame ensures all-day comfort and protection. Patented HDO provides superior clarity and razor-sharp vision at every angle perfect for everyday wear and sports. UNOBTAINIUM EARSOCKS, NOSE PADS & THREE-POINT FIT: Unobtainium earsocks and nose pads increase grip with perspiration to help provide a secure and custom fit. Three-Point Fit holds lenses in precise optical alignment. MICROBAG, CLEANING CLOTH & BRAND SHOP: Your new eyewear comes with a specially-woven electrostatic Microclear bag for cleaning and storage. Click on the Oakley link above the product title to shop the entire Oakley sunglass and eyeglass assortment.