Fits Most Dog Breeds Including and Size Guides:

MEDIUM, Up To 40 Pounds:   Mini Goldendoodle, Boston Terrier, Beagle, Corgi, Dachshund.

Length 18", Neck 14-20", Chest 20-28", Head 16-20"

LARGE, Up To 80 Pounds:  Labradoodle, Australian Shepherd, English Bulldog, German Shorthaired Pointer.

Length 22", Neck 18-24", Chest 26-35", Head 20-24"

EXTRA LARGE, Up To 100 Pounds:  Labrador Retriever, Golden Retriever, Rottweiler, Boxer.

Length 24", Neck 22-28", Chest 32-40", Head 24-28"

"Breed examples are average sized.  If your pet is smaller or larger than average, consider choosing a size smaller or larger than recommended."