Which patent type would best apply to a new and unique pattern on fabric?

A design patent is the most suitable choice for a new and unique pattern on fabric because it specifically protects the ornamental design of an article of manufacture. This includes the visual characteristics such as shape, configuration, or surface ornamentation. In the context of fabric, a design patent would cover the unique appearance of the pattern, allowing the patent holder exclusive rights to use, sell, or license that specific design.

Other types of patents serve different purposes: a utility patent protects the functional aspects and uses of an invention, a plant patent relates to new varieties of plants, and a process patent covers methods of doing something. These do not apply to the ornamental features of a fabric pattern, which is why a design patent is the most appropriate option for this scenario.