For small or medium dogs, but not for large dogs. NOTE: Please measure the size of your pet before ordering. Please allow 1-3 cm error measurement due to different measurement methods. The dog glasses are a good protection for your pet, it is fashionable and adorable when you bring your pet for walking / swimming / driving and so on. The sponge is padded around the lenses, the high density sponge is highly breathable and the thermal performance relieves eye strain or pressure on the shaft and the dog is usually not uncomfortable. The lens is made of high quality polycarbonate that can filter and reduce the intensity of UV, UV400, infrared and visible light. Protect your pet's eyes from UV, wind, dust and fog. Frame size is 15cm (length) x 4.5cm (width), the lens size is 5cm (length) x 3.5cm (width). Adjustable head and chin straps.