Size

Back Length

Chest

Neck

Weight (pounds)

X-Small

8

10-13

7-10

3-5

Small

10

13-16

10-12

6-10

Medium

12

16-19

12-14

11-15

Large

15

19-22

14-17

16-25

X-Large

19

22-24

19-22

26-30