PATCH SIZE: Eye patch size approx is 9.5x7.5 cm/3.7x2.9 inches, the width is approx 1 cm. WIDE APPLICATION: These soft eye patches fit for one eye care and shield, without excitant, avoid causing skin irritation, especially good for amblyopia strabismus. WITH ELASTIC STRAP: The eye patch has an elastic strap, with buckle to adjust the length to fit for your head, in case the strap will be too loose or too tight. COMFORTABLE MATERIAL: The surface of this eye patch is made of mulberry silk, with silk floss filled inside, very soft, breathable and comfortable to wear, will not hurt your skin. NO LIGHT LEAK: Made of light-shielding layers, completely opaque and no light leak. More effective to treat amblyopia.