A. Five sizes are available: XXS, XS, S, M, and L. It is recommended to measure your dog's muzzle circumference and neck circumference before purchasing. B. XXS size: Muzzle circumference ranges from about 19 - 27 cm, with a recommended weight of around 2 - 5.5 kg. C. XS size: Muzzle circumference ranges from about 26 - 34 cm, with a recommended weight of around 4 - 8.5 kg. D. S size: Muzzle circumference ranges from about 30 - 42 cm, with a recommended weight of around 7 - 12.5 kg. E. M size: Muzzle circumference ranges from about 38 - 52 cm, with a recommended weight of around 10 - 20 kg. F. L size: Muzzle circumference is over about 48 cm, with a recommended weight of over around 17.5 kg. G. The material is soft, comfortable, breathable, cool, and non - irritating. The three - hole design allows dogs to breathe relatively freely, and it is refreshing and relatively easy to clean. H. Design features: - The special soft - edge design helps prevent the mesh from rubbing against the dog's eyes and nose. - The adjustable nylon strap is equipped with a quick - release safety buckle, which can be adjusted according to the head circumference and is less likely to fall off. I. This muzzle can mostly cover the dog's mouth, helping to prevent the dog from biting, barking, and licking. There are small holes on it, which do not significantly block the dog's line of sight. It is suitable for daily outings, training, walks, visiting friends, and outdoor activities. J. This design is crafted for flat - faced and short - muzzled dogs, suitable for short - muzzled breeds such as English Bulldogs, French Bulldogs, Pugs, Boston Terriers, and Shar - Peis.