* Metalless and Screwless: Acrylic Lens, plastic frame with unique flexible spring hinges. * Blue Light Blocking Lenses: 100% UV Protection. 30% Blue Light Blocking. No Color Distortion. * Product Dimension: Frame width about 5.59 inches (142mm), Lens width about 2.09 inches (53mm), Lens height about 1.89 inches (48mm), Bridge (DBL) about 0.71 inches (18mm), Temple length about 5.51 inches (140mm). * Enhanced Durability: Functionally the arms can be opened super wide absolutely bend back without breaking. The metalless screwless spring hinges design guarantee the hinge's firmness. Don't need to worry anymore about the hinge lost, the ear arms(temples) fell off or any screw fell out. The arms snap back without an issue. * Just Right Elasticity: The hinges provide consistent soft elasticity force when the temples open outwards to both sides, the "just right elasticity" which are exceptionally comfortable, especially around the arms which do not seem to have screws making them more comfortable and less breakable.