Children's pirate one-eyed mask 3D correction amblyopia astigmatism single-eye mask Skin-friendly material This eye mask is made of soft and smooth material, which is comfortable and won't put pressure on your eyes. Adjustable Elastic Headband The elastic band adjusts from 11.8" to 21.6". It is adjustable, so you can adjust it to the desired length according to the size of your head. Suitable for adults and children. Care for your eyes Our patches are designed with 3D grooves and won't irritate or contact eyelids and eyelashes. Great for lazy eye training, surgery recovery period, everyday use. Fits both eyes Each eye cup measures 2.95" x 2.76"/7.5cm x 7cm. One size fits best. It can be used on either eye. You will get 2 dark circle stickers.