Dog goggles small breed: Suggest for small breed dog like Chihuahua, Yorkshire Terrier, Toy poodle, Maltese. These dog sunglasses will be very useful for car rides, hiking in windy conditions, and other outdoor activities.
Dog goggles Medium breed: 2 adjustable and elastic straps on the dog goggles, suitable for small to medium-sized dogs like Corgi, Shiba Inu, Beagle, Medium-sized Poodle, not suggested for small Chihuahua.
Curved design lens: In order to make the dog glasses suitable for dog's face and nose, these sunglasses are specially designed with curved lenses to cover dog's eye area well. 
Soft frame with vents: The dog sunglasses frame is made of soft rubber with comb shape vents, make goggles fit comfortably, also there won't be water mist on the lens.
Cool eye protection: Lens are made of high-quality polycarbonate, to protect your pets eyes from snow, UV, wind and dust, perfect for dogs who like to hang their head out car window or ride on motorcycle.
Size S: Length 4.5", width 1.7", adjustable length of head strap: 6"-10", adjustable length of chin strap: 5"-9". Please measure your dog before purchasing.
Size M: Length: 8", width: 2", adjustable length of head strap: 13.5"-18", adjustable length of chin strap: 6"-9". Please measure your dog before purchasing.