Fit for: Applicable head circumference: 15-20cm, applicable low jaw circumference: 17-24cm. Material: the lenses are made of AC resin, spectacles frame using EVA+PC material, durable, lightweight, comfortable, fit for small dogs as daily wear photo props or show, performance wear. Give the greatest eye protection against UV/wind/water/debris.Flexible bandadjustable elastic strap can adapt to fit the size of your dog and the chin strap design let you never worry about falling off easily. Head and chin have a precision elastic webbing make an easy to wear. Wide application: the dog glasses are suitable for daily wear, photo shot, parties, weddings and holidays, dress up your dog to make it more eye-catching, chic and charming. Sponge Pad inside: Sponge is padded around the lenses, high density sponge has a great breathable effect perfectly alleviating eyestrain or the pressure from the glasses and the dog will not feel uncomfortable for long-term wear. Suitable for puppy, Yorkshire Terrier, Dachshund, Poodle, Shih Tzu, Miniature Schnauzer, Chihuahua, Pug, Pomeranian, Boston Terrier, Maltese, Teddy, Bichon Frise, Shorthair, Balinese, etc. (Please measure dog head and jaw size before ordering dog sunglasses.)