How to fit your dog’s muzzle: 1.Measure under your dog’s chin, just behind the ears. 2.Please place your finger under the tape measure to ensure eChristmasgh room for your dog to be comfortable. 3.Fit the selected muzzle on your dog, test the fit by running your finger inside the strap.Your dog should be able to panting and have a free tongue to move. Basic Info: Material: Breathable Mesh, Nylon Size S: Neck Circumference: 36-48 It is recommended for dogs under 21-30.9lb (9.5-14kg) Size M: neck circumference: 48-56, it is recommended for dogs weighing under 32-47.4lb(14.5-21.5kg) Size L: Neck Circumference: 56-65, it is recommended for the dog over 49.6lb(22kg) Color: Black/Blue/Pink Suitable for Bulldog, Pug, Pit- Bull, Sharpet Package: 1 pcs short sChristmast dog muzzle If you have any quest ions before or after ordering, please feel free to email us, we will reply and help you solve the problem at first sight. Christmases: Please allow a slight deviation due to manual measurement.