Keep in Place-The adjustable overhead strap can make sure this anti-slipped muzzle remains in the proper place. In addition, you only need to adjust the neck strap to better fit your dog without worrying about this dog mussel falling off. Multiple Size Options-This pet muzzle is available in 6 sizes. The small dog muzzle is suitable for Dachshund, Jack Russell Terrier and so on. The medium sized dog muzzle is suitable for Border Collie, Husky and so on. The large dog muzzle is suitable for Labrador, Golden Retriever and German Shepherd and so on. But this dog muzzle is not suitable for flat-faced dogs such as Pit Bull and Boxer. It is important to choose the right size muzzle for your puppy. Please measure twice before buying. If you have any questions about sizing, we will work hard to fix your problem. Patented product, counterfeiting not allowed. How to measure: Use a soft tape measure to measure your dog's snout circumference and length. The measurement should be taken 1 inch away from the eyes. If your dog's measurements fall between two sizes, choose the larger size. Supervision is required at all times! Keep out of reach of children. This product is designed solely for short-term protective scenarios (Outings or Grooming) and cannot replace proper behavior training. If your pet shows signs of aggression, anxiety, or other problematic behaviors, please consult a professional dog trainer for a long-term corrective plan.