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 Best dog goggles design: Whether your dog's face is sharp or flat, these glasses will fit perfectly because they are bendable. The sponge on the frame increase the distance between the dog's eyes and the lenses, so that the lenses do not touch the dog's eyes, and also increase the comfort of wearing. Height 1.3", Length 4.5". Adjustable elastic head strap 13"-17", adjustable elastic chin strap:7"-10", these 2 straps are elastic, you also need to consider this factor when buying. 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.