From Maui Jim, the Bird PolarizedPlus2® Round 61mm Sunglasses feature:  Rectangular shape Monel metal frame Rubber temples Double bridge with adjustable, non-slip silicone nose pads Traditional hinge 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. 61.5mm eye - 15mm bridge - 135mm temple 8-base curve  Imported.