Material:Non-woven Fabrics Size(Approx.):10cm x 5cm /3.93" x 1.96"Color:BlackQuantity:12 CountBlack eye patches for glasses. The patches fit for most of the medium and small glass frame for kids.They can train the lazy eye to work properly. The eye patches are suitable for lazy eye, strabismus and amblyopia. They are easy to use just slide this patch on over the glass stem and wrap it around to cover the lens. Note:1>Sometimes products look larger or smaller on pictures,please refer to our actual description.2>Please allow little size error due to manual measurement. Package Include:12 x Black Eye Patche for Glasses