UNIQUE AND SPECIAL APPEARANCE: The design of these dog goggles is perfectly adapted to the dog's face, so the slightly curved glasses fit perfectly on the dog's face. At the same time, there are ventilation holes around the dog goggles that look like comb teeth, these dense holes can quickly dissipate the heat generated by the dog. LIGHTWEIGHT, SOFT & DURABLE: The dog sunglasses are made of UV-resistant PC lens and optical silicone frames, which are proven flexible and lightweight. They can be used for a quite long time. Your dog feels very comfortable without any burden when wearing our goggles. ADJUSTABLE STRAP: The dog goggles have high elasticity with adjustable length. They fit small dogs and medium-sized dogs. The double strap - head strap and chin strap allows your dog to wear it steadily. The glasses do not fall off easily. PROTECTS YOUR DOG'S EYES: They not only provide good visibility for your dog, but the soft frame does not harm the fur on the dog's face and eyes. They can prevent ultraviolet radiation, wind, blizzard, snow, dirt and ash. Overall, they can protect your dog from harm in the external environment. DIMENSION MEASUREMENT: The radius of the head is 20 cm long and the height is 5 cm. The lower radius is 5.5 cm. The head strap extends from 16.5 cm-27.5 cm and the adjustment range of the chin strap is between 13-24 cm (tension-free measurement).