Size Measurements Weight
X-Small Girth: 12-15" X Length: 9"in Fits dogs 5-9 lbs
Small  Girth: 14-17" X Length: 11"in
Fits dogs 8-13 lbs
Medium  Girth: 17-21" X Length: 14"in
Fits dogs 12-19 lbs
Large  Girth: 20-24" X Length: 16"in
Fits dogs 18-28lbs
X-Large  Girth: 23-27" X Length: 19"in
Fits dogs 26-40lbs