Please train your dog to use the muzzle before using it. Allow your dog to smell the muzzle and give him a treat. Repeat several times. Touch his nose with the muzzle and repeat several times until the dog finds it interesting. Hold the muzzle with one hand and fasten it with the other so that the dog has to put his nose inside and adjust the velcro. Give him a treat and remove it immediately. Repeat more times. Gently place the muzzle on his nose and give him a treat. Remove the muzzle immediately. As you place the muzzle on the animal, gradually increase the time the dog stays with the muzzle. Grab the leash and give treats. Placement Instructions: Place the muzzle loop over the dog's nose, making sure it fits comfortably. Bring the neck strap together and fasten the buckle parts. Make sure the neck strap is not twisted. Pull the end of the strap to secure the muzzle loop. Do not tighten too much. Measurements: Width: 12 cm, Height: 2 cm, Length: 16 cm