Size

Chest

Neck

Weight (pounds)

Back Length

X-Small

10”-13”

7”-10”

3-5

 8"

Small

13”-16”

10”-13”

6-10

 10"

Medium

16”-19”

13”-16”

11-15

11"

Large

19”-21”

16”-19”

16-25

 13"

X-Large

21”-26”

19”-23”

26-45

16.5"

2X-Large

26”-31”

23”-26”

45-70

 19"

3X-Large

31”-36”

26”-31”

70-90

21"