Finish nail sizes range from tiny 1/2-inch pins to larger 3-inch brads, with various options in between. These nails are characterized by their slender shanks and small, flat heads that sink below the surface of the material, providing a discreet and aesthetically pleasing finish. Commonly used for trim work, molding, and cabinetry, finish nails come in different gauges, indicating their thickness, with higher gauge numbers corresponding to thinner nails.