Vibrant Life Dog Collars

XS - Neck 6-9 inches, 5-10 pounds

S -  Neck 8-14 inches, 10-20 pounds

M - Neck 14-20 inches, 10-50 pounds

L -  Neck 15-26 inches, 50-90 pounds

XL - Neck 15-26 inches, 90 and above