Size    

    Neck   

    Chest    

    Weight   

XS

7″-8″

11″-13″

3-4 lbs

S

8″-10″

14″-16″

5-7 lbs

M

10″-13″

16″-19″

7-10 lbs

L

13″-15″

19″-23″

11-18 lbs

XL

15″-17″

20″-29″

20-29
lbs