Rectangular bucklers, according to Schmidt's typology (Type II), are historically documented and authentic for depictions of the Middle Ages and Renaissance. While round bucklers represent the classic form, the rectangular shape, with its straight edges, offers a more stable surface for parrying and can provide slightly wider coverage for the hand and forearm during vertical or horizontal defensive movements. Ultimately, however, the advantage depends heavily on the individual fencing technique and the specific situation in the reenactment.