6″ Dog coat: Length: 6″, Neck: 6″-8″, Under chest: 10″-12″ 8″ Dog coat: Length: 8″, Neck: 7″-10″, Under chest: 11″-14″ 10″ Dog coat: Length: 10″, Neck: 9″-13″, Under chest: 13″-17″ 12″ Dog coat: Length: 12″, Neck: 10″-14″, Under chest: 14″-18″ 14" Dog coat: Length: 14″, Neck: 12″-16″, Under chest: 16″-20″ 16″ Dog coat: Length: 16″, Neck: 14″-18″, Under chest: 18″-22″ 18″ Dog coat: Length: 18″, Neck 16″-20″, Under chest 20″-24″ 20″ Dog coat: Length: 20″, Neck 18″-22″, Under chest 24″-28″ 22″ Dog coat: Length: 22″, Neck 20″-24″, Under chest 26″-30″ 24″ Dog coat: Length: 24″, Neck 24″-28″, Under chest 30″-36″