Skin-Friendly Material This eye patch is made of soft and smooth materials, providing comfort without putting pressure on your eyes. Adjustable Elastic Headband The elastic band can be adjusted from 11.8 inches to 21.6 inches. It is suitable for both adults and children, allowing you to customize the fit according to head size. Care for Your Eyes The patch features a 3D groove design that avoids contact with the eyelid and eyelashes, reducing irritation. Ideal for lazy eye training, post-surgery recovery, and daily eye care. Suitable for Either Eye Each eye patch measures 2.95 inches x 2.76 inches (7.5 cm x 7 cm). One size fits most and can be worn over either eye. What You Get 2 black eye patches and access to friendly customer service.