Small

  • Chest Size: 35-45 cm / 14-18 in
  • Weight: 6.6-17.6 lbs 
  • Breed Examples: Maltese, Toy Poodle, Dachshund, Jack Russel Terrier, etc.

Medium 

  • Chest Size: 45-60 cm / 18-23 in 
  • Weight: 15.4-44 lbs
  • Breed Examples: Beagle, Shiba Inu, French Bulldog, Border Collie, Cocker Spaniel, etc. 

Large 

  • Chest Size: 60-90 cm / 23.5-35.5 in
  • Weight: 39.7-88 lbs 
  • Breed Examples: Boxer, Golden Retriever, Labrador Retriever, Siberian Husky, etc.