Size: Measurements:
X-Small Length 7-9" x Chest Up to 14" x Neck up to 12" 
Small Length 11-13" x Chest Up to 18" x Neck up to 15"
Medium Length 15-17" x Chest Up to 24" x Neck up to 17"
Large Length 19-21" x Chest Up to 28" x Neck up to 19"
X-Large Length 23-25" x Chest Up to 32" x Neck up to 22"