Dog Muzzle Buckle Design Breathable High Elasticity Pet Anti-Barking Muzzles Face Guard for Small Dogs . Our dog muzzles are with unsealing design and adjustable buckle, which are breathable, will not make pets feel sultry when worn, the tightness can be adjusted at will, making it cozy to wear. Dog muzzles can not only limit the dog's not good habit of chewing and biting furniture, but also prevent pets from biting people, eating garbage and barking at will. It is constructed of plastic material. There are 6 different sizes to choose. It is suitable for dogs with various mouth sizes. Item Name: Dog Muzzle Material: Plastic Features: Reusable, Eco-friendly, Breathable Size Details: Size: 2XS, Mouth Circumference: 10cm-13cm/3.9"-5.1", Neck Circumference: 23cm-27cm/9.1"-10.6", Weight: 3-5.5KG (Approx.) Size: XS, Mouth Circumference: 14cm-17cm/5.5"-6.7", Neck Circumference: 27cm-32cm/10.6"-12.6", Weight: 6-8.5KG (Approx.) Size: S, Mouth Circumference: 18cm-21cm/7.1"-8.3", Neck Circumference: 32cm-36cm/12.6"-14.2", Weight: 9-12.5KG (Approx.) Size: M, Mouth Circumference: 22cm-25cm/8.7"-9.8", Neck Circumference: 36cm-41cm/14.2"-16.1", Weight: 13-17.5KG (Approx.) Size: L, Mouth Circumference: 26cm-29cm/10.2"-11.4", Neck Circumference: 42cm-47cm/16.5"-18.5", Weight: 18-29KG (Approx.) Size: XL, Mouth Circumference: 29cm-33cm/11.4"-13", Neck Circumference: 48cm-56cm/18.9"-22", Weight: 34.5-44KG (Approx.) Notes: Please refer to our size chart and choose the right size. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Package Includes: 1 x Dog Muzzle