New England Patriots Dog Pet Sweater - All Sizes (Large) Please Note: These tend to run small; please measure your dog before ordering to insure a perfect fit): Length (XS 6-9", Small 8-12" , Med 14-18", Large 20-24") Girth (XS 8-12" , Small 13-18", Med 19-24", Large 25-28") Neck (XS 6-8". Small 10-14" , Med 14-18", Large 18-20")