Specifications: A humanistic way to work with strong and forceful dogs. Helps stop your dog biting, barking, and chewing. Fully adjustable strap with quick-release buckle. Made from soft plastic material, comfortable to wear. Type: Dog Muzzle Material: Plastic Features: Comfortable, Breathable, Adjustable, Mouth Cover Size Details Our Size 2 Top Width: 4cm/1.57", Top Height: 4.5cm/1.77", Bottom Length: 7.5cm/2.95", Bottom Height: 7cm/1.57", Suitable Collar: within 32cm/12.60" (Approx.) Our Size 4 Top Width: 5cm/1.97", Top Height: 6cm/2.36", Bottom Length: 9.5cm/3.74", Bottom Height: 9.5cm/3.74", Suitable Collar: within 40cm/15.75" (Approx.) Our Size 6 Top Width: 5.5cm/2.17", Top Height: 8.5cm/3.35", Bottom Length: 14cm/5.51", Bottom Height: 13.5cm/5.31", Suitable Collar: within 56cm/22.05" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Dog Muzzle A humanistic way to work with strong and forceful dogs. Helps stop your dog biting, barking, and chewing. Fully adjustable strap with quick-release buckle. Made from soft plastic material, comfortable to wear.