Sandwich chains are restaurant franchises that specialize in serving a variety of sandwiches, often including options like subs, wraps, and paninis. These establishments typically offer a customizable menu, allowing customers to choose their bread, fillings, and toppings. Popular examples of sandwich chains include Subway, Jimmy John's, and Quiznos. Many sandwich chains focus on quick service and convenience, making them popular choices for lunch or snacks. They often provide dine-in, takeout, and delivery options, catering to a wide range of customers. Additionally, some chains emphasize fresh ingredients and healthier choices, appealing to health-conscious diners.