XXS

XS

S

M

L

XL

XXL

full body length

5.5"

8"

10"

12"

15.5"

17.5"

20"

neck opening

3"

3.5"

4"

4.75"

7.75"

8.25"

9"

chest width

4"

5.25"

7.25"

8.25"

9.25"

10"

11.25"

weight

0-2lbs.

2-4lbs.

4-10lbs.

12-25lbs.

25-40lbs.

40-55lbs.

55-75lbs.