Weight | Back Length | Chest Girth | Size |
Up to 8 lbs | 6-9" | 10-13" | XS |
Up to 15 lbs | 9-12" | 13-15" | S |
Up to 25 lbs | 14-18" | 15-20" | M |
Up to 40 lbs | 20-24" | 20-25" | L |
Up to 60 lbs | 22-26" | 25-30" | XL |
Up to 120 lbs | 24-28" | 30-35" | XXL |
Up to 150 lbs | 26-30" | 35-40" | 3XL |