This exceptional helmet mask from Sierra Leone, was collected in the Bandugu region stands out clearly from the Mende helmet masks predominantly documented in the literature. Typical Mende helmet masks, used in the ceremonies of the Sande secret society, usually present stylized, oval or rectangular faces that are abstracted and often enhanced with fine incisions, painted decoration, and embellishments such as beads, copper foil, or small mirrors. These masks are generally designed to be worn by a dancer and remain proportionally small enough to allow mobility and expressive movement. By contrast, this Bandugu mask integrates an almost life-size female figure directly onto the helmet form itself. This vertical dominance—the figure standing atop the mask—is rarely documented in known sources. Such scale gives the mask a monumental presence, far beyond the usual helmet proportions, amplifying both its visual and symbolic impact in ritual contexts. The crown worn by the figure signifies authority and spiritual power, marking the mask as a unique type within Mende ritual artistry. Similar approaches, in which helmet forms are augmented with sculptural figures, are occasionally found in Liberia and southern Sierra Leone, but these are generally smaller or more stylized and do not reach the nearly life-size dimension of this Bandugu mask. This extraordinary example can therefore be interpreted as an innovative expression of artistic creativity, in which traditional formal principles are expanded and ritual symbolism made visually prominent. Functionally, the mask remains anchored within the context of Sande ceremonies: it likely served as a medium for female spiritual forces, as a conduit of initiation knowledge, and as a visible emblem of social order and authority. The oversized figure enhances not only the visual impact but also underscores the mask’s role as an intermediary between human participants, the ancestral realm, and the community. This Bandugu mask represents a rare, monumental type within Mende helmet masks. Whereas typical masks are limited to stylized heads, this example extends the traditional form to a fully sculptural, almost life-size figure, intensifying both the ritual and visual effect. It is a significant testament to the inventive capacity of Mende culture, demonstrating how mask form, symbolism, and performative function converge in a singularly powerful way. Informant: Bakari Bouaflé