Here is a nice Stud Leather Dog Collar for medium size dogs - Stud. From Mirage Pet Products is this genuine Stud leather dog collar. Sizes: 12, 14, 16, 18, 20, 22, 24, and 26 inches. Available Colors: Black, Burgundy. USA
Be sure to measure your pet's neck and use the Stud Leather sizing chart before ordering to get the best fit.