MUZZLE FOR SMALL DOG-Size S for snout circumference is 4-5 in and snout length is 2.5 in. Please measure the your dog's snout circumference and length before buying. SOFT & COMFORTABLE-Made by FDA food silicone, it is non-toxic, lightweight and not easily deformed. Fits perfectly to the dogs snout and will not hurt the dogs skin. SECURE & ADJUSTABLE-With a adjustable strap and nylon buckle, prevent the muzzle from falling off, allows you to quickly adjust the fit size for your dog. BEHAVIOR CORRECTION-It can prevent your dog some behaviors, like biting, barking, licking wounds and eating garbage, but your dog can still panting. HASSLE-FREE CUSTOMER SERVICE-Please measure twice before buying