WildOne Harness and Collar Size Chart

Neck Size Strap Width Fits Most
X-Small 7" - 10" 1" / 2" Pomeranian, Yorkie, Chihuahua, Mini Pinscher, Brussels Griffon.
Small 8" - 12" 3" / 4" Cocker Spaniel, Jack Russell Terrier, Shih Tzu, Pug, Boston Terrier.
Medium 12" - 15" 3" / 4" Border Collie, Australian Shepherd, Beagle, French Bulldog, Corgi.
Large 15" - 18" 1" Golden Retriever, Pitbull, German Shepherd, Standard Poodle, Labrador Retriever.
X-Large  18" - 23" 1" Great Dane, Mastiff, Bernese Mountain Dog, Saint Bernard, English Bulldog.