S size mouth circumference 17-21CM applicable weight 12-10kg M size mouth circumference 21-25CM applicable weight 20-17.5 kg L size mouth circumference 24-29CM applicable weight 35-25kg XL size mouth circumference 29-36CM applicable weight 50-40 kg FRIENDLY REMINDER: To make sure the muzzle fits your dog, please refer to our size chart to measure your dog's snout length and circumference. After you receive the muzzle, if your dog refuse to put on the muzzle, please do not force it to wear the muzzle as it will hate the muzzle. We recommand to treat your dog with snacks to distract it while putting on the muzzle. SOFT & DURABLE MATERIAL: We care your dog's health and feeling. Therefore we use premium non-toxic soft TPR rubber to produce this dog basket muzzle. The dog muzzle is super soft so it is comfortable for dogs' skin. The muzzle is also very tough and durable so it can be used for a very long time. ADJUSTABLE NECK & HEAD STRAPS: Most dog muzzles only have neck straps, so dogs can easily rip off the muzzle by paws. To solve this defect, we develop an adjustable head strap to provide additional assurance. You can adjust the head and neck nylon straps to fit your dog, and your dog will no longer easily rip off the muzzle by paws. BREATHABLE HOLLOW-OUT BASKET DESIGN: With this design, your dog can pant, drink water and even be fed treats through the Muzzle. The basket design also gives all-around mouth protection preventing biting barking and chewing. This dog muzzle is perfect for daily outdoor walking, exercise or grooming. REFLECTIVE TRIMMING STRAP DESIGN: Every year, many pet dogs are hit by cars or lost during dark night running. By wearing this muzzle for dark night outdoor walking, the reflective strap can reflect light from your torch or a vehicle, improving the safety of walking your dog at night.