A collar is a band of fabric or material that encircles the neck of a garment, such as a shirt or jacket. It serves both functional and decorative purposes, helping to keep the garment in place and adding style to the overall look. Collars can come in various shapes and sizes, including pointed, mandarin, and Peter Pan styles. In addition to clothing, the term "collar" can also refer to a type of accessory worn by pets, particularly dogs and cats. These collars often hold identification tags and can be used for training or safety purposes. They come in various materials, colors, and designs to suit different pets and their owners' preferences.