●Material: Made of plastic, light and easy to carry, not easy to break. ●Size: Lens unfolded length and width 17*5cm, strap width 2cm, chin strap length 9.5-19cm (adjustable), back head strap length is about 8.2-17cm (adjustable). ●Function: UV protection and prevention are the key to healthy pet eyes. This eye is very suitable for dogs in summer or windy weather. ●Convenient to wear: The chin and head circumference can be adjusted appropriately, which is very suitable for dogs of different sizes. You can adjust to the most comfortable state. ●Tips: This product is most suitable for medium and large dogs, and mini breeds should be purchased with caution. Light and display may also affect chromatic aberration. Please forgive me.