Hunter Dog Tee Licensed NFL Cotton T-Shirt Medium - Neck 14"; Length 15"; Girth 24"(for some French Bulldogs/Pugs/Jack Russells) Large - Neck 16"; Length 18"; Girth 27" (for some Cocker Spaniels/Schnauzers) XL - Neck 18"; Length 21"; Girth 32" (for some Boxers/Collies/small Labs)