SIZING INFORMATION: This frame size is X-Small with a hinge to hinge measurement of 124. Ideal for narrow faces. FRAME FEATURES: OX8178 Rafter feature a rectangular, matte clear frame. PRESCRIPTION READY EYEGLASS FRAMES: Oakley eyeglass frames feature lenses that need to be replaced with prescription lenses so you can enjoy clear vision. LIMITLESS COLLECTION: Pushing beyond your limits can yield unexpected results.​ Featured color combinations offer a refreshing perspective​, with new accents like Muted Metallic Mahogany provide subtle shimmer​. High energy eyewear for the bold. BIO-MATTER FRAME: BiO-Matter frame material is made from bio-materials with at least 56% bio-based carbon content. This percentage indicates how much of the material mixture is obtained from castor oil sources versus petrochemical or fossil sources. VISIT THE OAKLEY BRAND SHOP: Click on the Oakley link above the product title to shop the entire Oakley sunglass and eyeglass assortment.