Size: One size fits all, Dollger anti blue light glasses are ideal for protecting your eyes during long hours of computer use. Its unique design of super lightweight metal half frame is modern and elegant. These glasses have shock-resistant and dust-proof lenses, made with aerospace grade PC material. In addition, the silicone nose pads are skin-friendly and allergy-free, providing comfort throughout the day. Use them when you are working, reading, playing or doing outdoor activities. Includes 1 pair of blue light blocking glasses, 1 cleaning cloth and 1 glasses bag. Product size: Total width: 138 mm, Lens width: 52 mm, Lens height: 54 mm, Bridge: 20 mm, Arm: 143 mm, Weight: 29g. Cleaning: It is recommended to clean the lens with soapy water or neutral detergent regularly.