Sidebar brings a soft square shape to life with clean lines and an easy, modern presence. It’s a confident, quietly polished frame that stands out with its own sense of style. Details Optical Fit: 51-19-145 Frame Width: 137 mm (5.4 in) Temple Length: 145 mm (5.7 in) Eye Size: 51 mm (2.0 in) Nose Bridge: 19 mm (0.7 in) B Measurement: 39.8 mm (1.6 in) Blue Light Focus Lenses utilize proprietary baked-in technology that filters high-energy visible blue light Unique Lens Clearness all the comfort, all the style, with barely-there tints Dual Anti-Scratch Coating for long-lasting protection UV400 Protection blocks 99.9% of UVA/UVB rays Acrylic Aspheric Material Lens that's ultra-thin and lightweight Spring Hinges for a durable, comfortable fit Polycarbonate frame that’s super-strong and ultra-lightweight.