Product Title:Pet Dog Muzzle Useful Dog Anti-bite Muzzle For Small Medium Large Dogs Durability Mesh Portable Multifunction Dog Muzzle. Item Type: Dog Muzzle Material: Mesh Color: Yellow/ Pink/ Grey/ Blue Size: XS/ S/ M/ L/ XL/ 2XL Features: Anti-call anti-bite anti-disorder can drink Selecting the right muzzle for your dog: 1. Use string (or a fabric tape measure) to measure your dog's snout just behind the nose. The muzzle must not be tight. 2. Place your forefinger just under the string to ensure enough space for your dog to be comfortable-don't tighten the string it should be free to move around the dog's nose. 3. Lay the string along a ruler to determine your dog's nose circumference. Find the corresponding size according to the size chart below-if it is not an exact match then take the nearest size. 4. Fit the selected muzzle on your dog. Check the fit by running your finger inside the nose band. Your dog must be able to pant and have free tongue movement. Package Includes:1 PC Dog Muzzle Due to different measurement methods, please allow a measurement error of 2-3cm. Due to the problem of shooting tools and light, please allow the color difference between the picture and the product.