PROTECT FROM BLUE LIGHT AND BLOCK UV - If your kids are constantly playing video games and looking at digital screens, they need it to protect their eyes from harmful blue light that can cause extreme eye strain, visual fatigue and eye dryness. ANTI EYE-STRAIN & BETTER SLEEP - The superior clear lenses filter most blue light from digital screens efficiently day and night, reduce headaches, fatigue, dry eyes, help your kids get healthy eyes and better sleep. PRODUCT SIZE - Lens Width: 45mm, Frame Height: 41mm, Nose Bridge: 16mm, Frame Width: 106mm, Temple Length: 125mm. These glasses fit mostly 3-12 year old kids but it depends on the size of the kids. For more accuracy, please refer to the frame size. FASHION DESIGN - Classic design, never out of fashion, gives kids a cool look with the bright colour and unique style, suitable for all young boys and girls. LIGHTWEIGHT & DURABLE - The frame is made by TR90 with super toughness, wear-resistance and thus the frame is not easily deformed or damaged. The flexible glasses can fit kids well, and will not make kids feel uncomfortable after long-time wearing.