Extra Small
Weight: 10lbs
Length: 10"
Neck: 8-11"
Chest: 11-16"
Head: 8-12"

Small
Length: 14"
Neck: 10-16"
Chest: 16-23"
Head: 12-16"

Medium:
Weight: 40lbs
Length: 18"
Neck: 14-20"
Chest: 20-28"
Head: 16-20"

Large
Length: 22"
Neck: 18-24"
Chest: 26-35"
Head: 20-24"

XLarge
Length: 24"
Neck: 22-28"
Chest: 32-40"
Head: 24-28"