NEWBORN: 5-10lbs Waist 12-19 inches, Rise 12" front to back, stretched
SMALL: 8-15lbs, Waist 13-20", Rise 14"
MEDIUM: 15-30 lbs, Waist 16-22", Rise 16"
LARGE: 25-40 lbs, Waist 18-24", Rise 18"