Size M for Medium Dogs: The muzzle for medium sized dog is suitable for dogs with a snout circumference of 9¾"-10¾" and a snout length of 2¾-3½". The dog muzzle for medium dogs are fit for Border Collie, Husky, and so on. To make the soft muzzle for medium sized dog fit your dog perfectly, please measure the size before buying Comfy & Breathe-Easy: The basket mesh dog muzzle features a basket-shaped mesh with diamond-shaped holes that provide ample airflow, allowing your dog to pant. The smaller holes are also not easily ripped by your dog's nails Convenient & Adjustable: You can easily put the dog mouth guard on or take it off your dog with the quick release buckle. Both adjustment strap and collar loop can keep the mouth guard for dogs stay in place, making it difficult to break loose Reduce Bad Behavior: This soft dog muzzle not only prevents scavenging, but also prevents dogs from biting, licking, and chewing. Let's help your dog develop good habits to make your dog and others closer Humane Muzzles for Dogs: The humane muzzle will not interfere with your dog's daily activities, such as drinking water. So your dog can do indoor or outdoor activities like nail clipping, walking, training, grooming, or vet visits Supervise Muzzled Dogs for Safety: Use breathable muzzles that allow panting and drinking. Never leave dogs unattended, as stress from muzzling may cause potential risks. Keep kids away from dogs displaying aggression or anxiety, even dogs with muzzles Mayerzon Dog Muzzle, Soft Mesh Muzzle for Small Medium Large Dogs Anti Bite Scavenging, Breathable Adjustable Mouth Guard for German Shepherd Labrador Golden Retriever in Grooming Walking Vet Visits