Product Size. XXS: 19cm-27cm neck circumference XS: 26cm-34cm neck S:30cm-42cm neck circumference M:38cm-52cm neck circumference L:48cm+ neck circumference. The Dog Muzzle is breathable and bite proof to prevent food theft. Suitable for bulldogs, pit bulls, pugs and other dogs with flat faces. Material:The muzzle is made of high quality mesh and nylon. It is skin-friendly, soft and comfortable, breathable and cool, non-irritating. Three-hole design allows dogs to breathe freely, refreshing and easy to clean. Design:The special design with soft edges prevents the mesh from rubbing on the dog's eyes and nose. Adjustable nylon strap, quick-release safety buckle, adjustable according to head size, does not fall off easily. The muzzles can completely cover the dog's mouth to avoid biting, barking and licking. It has eyelets and does not block the view of the dog. It is suitable for daily trips, training, walking, visits and outdoors. The perfect design is designed for flat and short mouth dogs that are suitable for English Bulldogs, French Bulldogs, Pugs, Boston Terriers, Shar Pei, Pugs and other short snout dogs.