Natural Cow Fur (Fur Origin: USA) The eye patch has an adjustable elastic band. You can adjust it to the desired length according to the size of your head. The eye patch is designed to be lightweight, durable and comfortable. Its dome shape ensures that it does not touch the eyelids, while effectively protecting the sensitive eye area. The eye patch features an adjustable elastic band, allowing you to customize the length to fit your head size. It is designed to accommodate sizes ranging from 22" to 24.5". The size of the eye patch 4.5"(11.2 cm) X 1.75" ( 4.5 cm). Make sure to measure your head before ordering. The top strap can be turned around to adjust the strap's position on a forhead. The eye patch is effective in blocking approximately 90% of the light. With repeated use, the leather material of the patch will naturally soften, resulting in an even greater level of light blockage. I carefully pack the eye patch into a food-grade ziplock bag and a small box to ensure its protection and hygiene. The choice of food quality ziplock bags is intentional, as they are designed to be non-toxic, providing an added layer of safety for the item. This eye patch is hand crafted from 100% premium veg tan leather and has adjustable elastic band. You can adjust it to the desired length according to the size of your head. If there are any issues with the item, please let me know and I will be happy to help. Real leather, like any natural material, may have small defects that are inherent to the material. These natural defects can include tiny marks, scars, and variations in texture or color. These natural marks are a sign of the leather's authenticity and should not be viewed as a defect in the product.