No. 1, mouth length 6cm, mouth circumference 20cm, head circumference 30-40cm;No. 2, mouth length 7cm, mouth circumference 23cm, head circumference 34-48cm;No. 3, mouth length 8cm, mouth circumference 26cm, head circumference 39-51cm;No. 4, mouth length 9cm, mouth circumference 28cm, head circumference 45-59cm;No. 5, mouth length 10cm, mouth circumference 33cm, head circumference 47-61cm.Secure and Comfortable Fit: This soft basket muzzle is designed to securely and comfortably fit your dog's snout, ensuring a reliable and safe solution to prevent biting, chewing, and excessive barking.Prevents Biting and Chewing: The basket design allows your dog to pant, drink water, and even receive treats while wearing the muzzle, while still effectively preventing biting and chewing unwanted items.Reduces Excessive Barking: By limiting your dog's ability to open its mouth fully, this muzzle helps control and reduce excessive barking, providing a more peaceful environment for both you and your dog.Safe and Humane: Constructed with soft and durable materials, this muzzle ensures your dog's comfort and safety during wearing. It features adjustable straps and padding to provide a snug and irritation-free fit.Versatile Usage: Suitable for various situations such as visits to the vet, grooming sessions, public places, or training sessions where extra caution is required. This muzzle offers a practical solution for responsible dog owners.