Batman v Superman and who will win? You will after a great night's sleep with this light-blocking sleep mask!! One side of this reversible mask is soft blue Superman flannel cotton, the other side is Batman cotton. Inside is a hidden layer to help block the light. The comfortably wide elastic is black, shiny on one side. Pattern placement will vary. Large adult size: Mask is about 8 inches by 3inches from center. Elastic measures 13.5 inches. Fits a head about 22.5 to 24 inches. Average adult/teen size: About 8in (20cm) by 3in (7.5cm). Elastic measures about 12.5 in (32cm). Fits a head about 21 to 23 inches. Older child size: About 7.5 in by 2.5 in. Elastic measures about 12 in. Fits a head about 20-21.5 inches. Toddler/small child size: About 7 in by 2 in from center. Elastic is about 11.5 inches. Fits a head about 19-20 inches. Soft and comfy, carefully handmade in the USA. Product is legally handmade with licensed Marvel Comics and DC Comics material and is not a licensed product from either, nor is onetwothreejump in any way affiliated with Marvel Comics or DC Comics.