Only suitable for small dogs.mouth circumference 5.3''. neck circumference 5''-11''. mouth height 2.3''Just a little bigger than size S mouth circumference 5.3''. neck circumference 5''-11''. mouth height 2.3'' It¡¯s best for the dog¡¯s mouth to be smaller than our size(Just a little bit smaller). otherwise it won¡¯t fit in or it¡¯s uncomfortable to wear too tightly. Dog mouth cover can prevent your dog biting. eating. barking or licking wounds.Dog mouth guard works for grooming. travel. pet training. pet store or pet hospital. This is a good cosplay decoration.Take dog mussel like a duck.The surface is smooth and does not hurt the dog¡¯s skin. is easy to clean and does not deform.The opening design allows the dog to breathe freely without hurting the dog¡¯s nose. Strap is elastic. soft. cozy and can be adjusted freely. Wearing this. your pet will feel comfortable. When your dog goes out wearing this product. dog mask can turn its head cutely without any pressure. Reason for selectionºThis is a good cosplay decoration.Take dog mussel like a duck.The surface is smooth and does not hurt the dog¡¯s skin. is easy to clean and does not deform.The opening design allows the dog to breathe freely without hurting the dog¡¯s nose¬dog mask is the best gift for family and friends who like to keep dogs. they will deeply in love with it.