Pets' US Size Chart

PETS Neck to tail inches Chest inches
Extra Small 6" - 8" 10"
Small 10" - 12" 14"
Medium 14 " - 16" 17"
Large 18" - 20" 20"
Extra Large 22"- 24" 24"

Pets' International Size Chart

PETS Neck to tail cm Chest cm
Extra Small 15.24 - 20.32 25.4
Small 25.4 - 30.48 35.56
Medium 35.56 - 40.64 43.18
Large 45.72 - 50.8 50.8
Extra Large 55.88 - 60.96 60.96