CambridgeAbout If you don't know what style is right for you try the Cambridge. A classic round eye that's not too small and not too big. With a sleek arm, these are perfect when you're working with headphones of any kind on. They're flexible and easy to adjust the shape. Lens Blue Light Blocking Lens Filters 45% High Energy Blue Light Frame Dimensions (mm) Frame Width 135 Arm Length 144 Nose Bridge Width 10 Lens Height 44 Face Shape Unisex, medium to large