Petmuch Adjustable Silver Nylon Mesh Dog Grooming Muzzle Anti Bites Bark S:mouth circle 4.7 inch--5.8 inch; M:mouth circle 5.5 inch--7.2 inch L:mouth circle 7.0 inch--8.5 inch ; XL:mouth circle 8.5 inch--10.5 inch ; XXL:mouth circle 10.3 inch--12.6 inch Well-fitting, comfortable muzzle is made of high quality Nylon. This size generally most suitable for Medium German Shepherd, Labrador, Husky, Retriever or other breeds with similar snout structure Please, measure your dog's snout to insure this is the correct muzzle size you need Whenever in the street our dog is muzzled