Product descriptionSize:SColor:Black Product description1.Adjustable and Secure: The Dog Muzzle Is Adjustable, And The Nylon Neck Strap Is Easy To Wear And Install. 2.Neck Strap Which Prevent The Muzzle Falling OffComfortable&Breathable: The Muzzle Use Breathable Mesh Material Make The Dogs Feel More Comfortable And Breathable,And The Materrial Above The Nose Is More Soft Than Other Muzzle,Nylon And Breathable Mesh Material Can Reduce The Weight Burden Of Pets 3.Protcetion: Using The Muzzle Can Effectively Prevent Dogs From Biting ,Eating Unclean Food And Hurting Others. 4.SizesThe Dog Muzzle Available In 5 sizes Can Be Adjustable To Be Used For All Dogs Including Tiny And Gint Breeds ,If Your Dogs Circumference Is Between Two Sizes, Smaller Size Would Be More Suitable. 5.Attention: Most Dogs Don't Adapt To Wear Muzzle At The Beginning, So We Have To Take Time To Make Them Adapt Muzzle Patiently. NotePlease Measure The Dog Need What Size Before Order.Measurement methods:Mouth Circumference:When Measuring, Please Measure Near The Nose.Mouth Length:Dog The Length From The Bottom Of The Mouth To The Neck Muzzle Sizes Map:S: Suitable for dogs with a mouth size of 12-15cm Muzzle Features:1,Does Not Affect Dog Breathing2,Does Not Affect The Dog Drinking Water3,Free Adjustment, Very Comfortable Other SuggestionStep 1: Put The Muzzle Where The Dog Can Touch It, Let the Dog Sniff It,Continual Praise And Treat,Repeat Until Your Dog Indicates That The Muzzle Looks Interesting In A Way.Step 2 :Take The Muzzle And Gently Touch It To Your Dog's Body,Slowly Approaching The Dog Face. Give A Treat. Repeat.Step 3 :Holding The Muzzle In One Hand And Giving A Treat In The Other Hand, So He Needs To Put His Nose Inside The Muzzle To Get The Treat. Repeat Until Your Dog Seems Used To The Muzzle.Step 4 :Put The Muzzle On The Dog And Quickly Lock The Buckle. Treat. Removing The Muzzle After Several Seconds.Step 5: Repeat Step 4 Few Times Until They Become Used To Wearing The Muzzle