AVERAGE HARNESS RECOMMENDED AVERAGE COMMON BREED SIZING SIZE HARNESS WIDTH WEIGHT (The breeds listed in this section are averages, some dogs may be (pounds) smaller or larger than average so it's always a good idea to have an actual measurement for reference.) XS 5/8" 12 - 17 Bichon Frise, Cocker Spaniel, Miniature Dachshund, Fox Terrier Neck 10" - 14" (Smooth & Wire), Havanese, Italian Greyhound, Jack Russell Terrier, Chest 14" - 20" Lhasa Apso, Miniature Poodle, Pug, Miniature Schnauzer, Shi Tzu, Skye Terrier, West Highland White Terrier. SM 5/8" 18 - 25 Basenji, Beagle, Bedlington Terrier, Border Collie, Boston Terrier, Neck 10" - 14" Corgi, Dandie Dinmont Terrier, Irish Terrier, Keeshond, Manchester Chest 20" - 24" Terrier, Samoyed, Schipperke, Scottish Terrier, Shiba Inu, Welsh Terrier, Wheaten Terrier. MD 5/8" 25 - 40 American Foxhound, Australian Cattle Dog, Australian Shepherd, Neck 14" - 18" Canaan Dog, Standard Dachshund, French Bulldog, Glen of Imaal Chest 24" - 28" Terrier, Harrier, Kerry Blue Terrier, Miniature Bull Terrier, Sheltie, Sussex Spaniel. MD 1" 40 - 65 Airedale Terrier, American Staffordshire Terrier, Azawakh, Bull Terrier, Neck 14" - 18" Char-Pei, Ibizan, Plott, Pointers (most), Portuguese Water Dog, Chest 24" - 28" Redbone Coon Hound, Saluki, Standard Schnauzer, Sloughi, Spaniels (most), Spinone Italiano, Whippet. LG 1" 60 - 85 Afgan Hound, Akita, Belgian Sheepdog, Belgian Malinois, Borzoi, Chart Neck 16" - 20" Polski, Collies (most), Doberman Pinscher, English Bulldog, Galgo Chest 28" - 32" Espanol, German Shepherd, Greyhound, Norwegian Elkhound, Retrievers (most), Giant Schnauzer, Rodesian Ridgeback, Setters (most), Siberian Husky, Weimaraner. XLG 1" 85 - 140 Alaskan Malamute, Bernese Mountain Dog, Boxer, Borzoi, Briard, Neck 20" - 26" Bouvier des Flandres, Bull Mastiff, Dogue de Bordeaux, Great Dane, Chest 32" - 36" Irish Wolfhound, Leonberger, Otter Hound, Pyrenean Mastiff, Rottweiler, Spanish Mastiff. 2XL 1" 140 - 250 English Mastiff, Great Pyrenees, Neapoltan Mastiff, Newfoundland, Neck 26" - 34" Perro de Presa Canario, St. Bernard, Tosa Inu-Tosa Ken. Chest 36" - 44" .