SMALL
Neck: 12.5" Length: 7.5" Waist: from 13.2" to 19.7"
MEDIUM
Neck: 15.7" Length: 9" Waist: from 15.7" to 23.2"
LARGE
Neck: 18.9" Length: 10.5" Waist: from 21.6" to 43.3"