From Maui Jim, the Women's Good Fun PolarizedPlus2® 57mm Tortoise Butterfly Sunglasses feature: Butterfly shape Nylon frame SuperThin Glass - Provides the absolute crispest optics available. 20% to 32% thinner and lighter than standard glass, it offers the best scratch and solvent resistance PolarizedPlus2® lenses eliminate 99.9% of glare, block 100% of harmful UV and absorb harmful HEV Rx able Approx. 57mm eye - 19mm bridge - 145mm temple Imported.