- X-Small :: Up to 12 lbs // Back length 10-12" // Girth 15-18"

- Small :: Up to 17 lbs // Back length 12-14" // Girth 16-20"

- Medium :: Up to 25 lbs // Back length 13-16" // Girth 20-24"

- Large :: Up to 35 lbs // Back length 16-20" // Girth 22-26"

- X-Large :: Up to 48 lbs // Back length 20-23" // Girth 24-28"

For more details, please check Shipping Information here.