From Maui Jim, these Unisex Anuenue 52mm Polarized Square Sunglasses feature: Nylon Classic, square shape  Single bridge  Adjustable, rubber nose pad  Traditional pin hinge Gender: Unisex  Sizing: Small  Square lens  Lens Material: MauiPure® - MauiPure® is Maui Jim's most popular plano lens material.  Combines optics almost as crisp as SuperThin Glass with ultra lightweight and excellent scratch and shatter resistance Bi-gradient lens  Rx able Polarized Approx. 52mm eye - 20mm bridge - 143mm temple - 45mm vertical/ 6mm plano curvature Imported.