Adjustable and Safe: The dog muzzle is adjustable, with a nylon neckband that is easy to wear and install. A plastic buckle on the neckband helps secure the mouthpiece in place. Comfortable and Breathable: The mouth cover is made of breathable mesh material, providing comfort and airflow. The area above the nose is made with softer material compared to other muzzles. Nylon and breathable mesh help reduce discomfort for pets. Functionality: Muzzles can help prevent dogs from biting, eating inappropriate items, and causing harm to others. Variety of Sizes: This dog muzzle is available in 6 sizes to fit a range of dog breeds, including puppies and larger breeds such as Golden Retrievers. If your dog's measurement falls between two sizes, choose the smaller size for a secure fit. Note: Most dogs may need time to adjust to wearing a muzzle. Allow your pet to gradually become comfortable with it. Note: Please measure your dog before ordering. Measurement Guide: Mouth Circumference: Measure around your dog's snout at the widest part. Mouth Length: Measure from the bottom of the jaw to the base of the neck. Size Chart: XS – Puppy snout circumference: 3.5–4.7 inches / 9–12 cm S – Dog snout circumference: 4.7–6 inches / 12–15 cm M – Dog snout circumference: 5.5–7.8 inches / 14–20 cm L – Dog snout circumference: 7–9.4 inches / 18–24 cm XL – Dog snout circumference: 9–11 inches / 23–28 cm