Be Good Pullover Lovely Sweater Hoodies Winter Coat Jacket Warm Sweatshirt with Sweet Bow tie Clothes for Small Dog Puppy 4 XS - back length: 6.7''/17cm; chest: 10.6''/27cm; Neck: 8.7''/22cm S - back length: 8.3''/21cm; chest: 14.1''/36cm; Neck: 11.8''/30cm M --Longueur back: 12''/31cm; chest: 15.7''/40cm; Neck: 11''/28cm L - back length: 15.3''/39cm; chest : 22''/56cm; Neck: 14.1''/36cm Note: when we choose a cloche for our pet,chest is the priority,then it's back length.To avoid this hoodie is too big or too small for your dog, please carefully measure your dog!