Sierra is an antiqua with a high x-height and generous, open counters. Many curves of the letters are almost right angles, which was particularly suited to the Digiset machines from Dr. Ing. Rudolf Hell, Kiel. The forms of Sierra with their flowing stroke contrast and half serifs have a calligraphic touch, which is especially highlighted in the italic weights.
This is a graceful text type and its bold weights look almost like woodcuts. Sierra is an excellent choice for both texts and headlines.