Sunlight Protection: The lenses of these dog sunglasses have passed the UV-400 test, blocking more than 99% of UV rays. If your dog has eye disease, or enjoys outdoor sports, these dog goggles are a must-have Suitable for small dogs and cats. Frame height 3.5cm, frame inner width: 11cm, frame outer width: 10.6cm, lens width 4cm, nose spacing: 1.3cm. Head circumference: 20-30cm, jaw: 15-24cm. Suitable for: small dog and large cats, such as Yorkshire, Bichon Frise, Dachshund, Shih Tzu, Schnauzer, Teddy, Chihuahua etc. Not for very mini tiny dogs, please check the size carefully before purchasing. Tips for use: Dog may hate these goggles the first few times use, you can let them the bonus of wearing these goggles, such as an outdoor riding or driving, when your dog realizes that the glasses are protecting him, he will loves these goggles soon.