✔ Size: The standard diameter of the mask with rubber band is 56 cm (22 in) ✔ Materials: Three layers compose this sleep mask ➘ - The inner surface is a very nice and smooth tissue, comfortable for your eyes while you sleep - The inside layer is made of special fabric that blocks all light from outside - And the exterior is a beautiful colorful fabric to complement your night clothes ✔ Care instructions: - Machine wash at 30 degree with similar colors - Or gently hand wash in lukewarm water - Straighten and hang to dry ✔ All monitors are different so colors may vary slightly