Size   Chest Neck  
Length (in inches) (in inches) Breed Examples
Extra Small 8" 12"-16" 10"-12" Bichon Frise, Brussels Griffon, Maltese, Miniature Pincher, Papillon
Small 12" 16"-20" 12"-14" Dachshund-Miniature, Norfolk Terrier, Pekingese, Pomeranian, Toy Poodle
Medium 16" 20"-24" 14"-16" Beagle, Dachshund, Jack Russell Terrier, Lhasa-Apso, Miniature Scottie, Pug, Schnauzer
Large 20" 24"-28" 16"-20" Small Bocer, Labrador Retriever, Golden Retriever, Weimaraner, Whippet