Sizes of dogs, even purebreeds can vary, for correct fit measure your dog"s muzzle circumference and length. We can not pay for return or exchange shipping. Please measure your dog"s muzzle to be sure of the size. Sure-Fit Dog Muzzle greatly reduces the risk of dog bites. New mesh design is breathable and features quick release tabs for easy secure use. Helps to prevent your dog from eating pooh, frogs, rocks and other potentially unhealthy things. Sure-Fit muzzles are a temporary, reliable restraint ideal for grooming, training and walking your dog. Nearly impossible for dogs to remove. New line of strong woven mesh nylon can be sanitized by washing. Only available in black. Available in 7 Other Sizes. Muzzles should only be used with direct supervision. Never leave a dog muzzled and unattended. Use for temporary restraint only.