Classic Bamboo Sunglasses - Polarized Lens, Hard Case - Tree Tribe Bamboo frame Composite lens Polarized Lens width: 51 millimeters POLARIZED LENSES - Provide crystal clear vision with UV400 protection and a scratch resistant coating. 51mm x 40mm lens. UNIQUE BAMBOO FRAMES - These are made from thin layers of bamboo compacted together for a lightweight, thin style. CLASSIC NATURAL STYLE - Unisex frame: 138mm front width x 152mm length x 47mm height (5.4" x 6.0" x 1.9") BAMBOO CASE AND MICROFIBER POUCH - Includes a bamboo tube case and microfiber cloth pouch to protect and clean your glasses. WE PLANT TREES - On every sale, we plant 10 trees. Tree Tribe is all about the Earth and coming together as a community. We're partnered with non-profit tree planting organizations to help us in our mission of improving the health of the planet.