Sizing 

Back length: Measure from the base of your dog’s neck (right below where their collar would sit) all the way to just above the top of their tail. 

Chest girth: Measure around the largest part of your dog’s chest, just behind their forelimbs. 

Size        Back Length        Chest Girth

12                  12"                   Up To 20"

14                  14"                   Up To 22"

16                  16"                   Up To 25"

18                  18"                   Up To 27"

20                  20"                   Up To 29"

22                  22"                   Up To 32"

24                  24"                   Up To 34"