Adjustable dog collars are designed to fit a variety of dog neck sizes, which makes them ideal for puppies or dogs that are still growing. These collars typically have a buckle or clasp that allows for easy adjustment, and some even have multiple sizing holes to accommodate different neck sizes. Adjustable dog collars can be made from a variety of materials, including nylon, polyester, and leather, and may come in a range of colors and patterns.
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