SIZING

Extra Small: Up to 12 lbs., such as a Yorkshire Terrier
• 9-11" length (from base of neck to base of tail) 
• 12-17" chest circumference
• 8-11" neck 

Small: Up to 30 lbs, such as an English Toy Spaniel
• 15-17" length (from base of neck to base of tail) 
• 17-22½" chest circumference
• 11-14" neck 

Medium: Up to 35 lbs, such as a Beagle
• 18-20" length (from base of neck to base of tail) 
• 21-29" chest circumference
• 14-18" neck

Large: Up to 55 lbs, such as an Irish Terrier
• 21-23" length (from base of neck to base of tail) 
• 24½-33" chest circumference
• 18-21½" neck 

Extra Large: Up to 80 lbs, such as a Labrador
• 24-26" length (from base of neck to base of tail) 
• 31-41" chest circumference
• 21-23" neck