You can't prevent your cute doggy from growing or gaining weight. And then a new question arises "what is better: buying a new collar and overpay or save money and buy extra links for your present pinch collar?". The answer to that question is obvious.
We recommend you these Extra Links for Herm Sprenger Stainless Steel Pinch Collar.
They snap in easily for extra length. It is also convenient that you won't need special tools or skills to add extra links.
These links are made of Stainless Steel. This alloy has many advantages over the normal steel. It has a higher resistance to oxidation (rust) and corrosion in many natural and man-made environments. Stainless steel is, above all, a very practical material, however, this material is both aesthetically beautiful and noble.