FigZero 1/6 Roy Mustang is an articulated figure approximately 29.5cm tall, with approximately 37 points of articulation. Its costume uses fabric (The fabric costumes are stitched and cannot be taken off). The head piece is sculpted by renowned sculptor Akinori Takaki. The face piece is interchangeable between a standard face, a sideways glance face, and an angry expression face. It also includes two sets of interchangeable hair pieces: a set of standard hair pieces and a set of drifted hair pieces (Each set of hair pieces consists of front hair and back hair).

The figure comes with five kinds of interchangeable hands: a pair of gloved hands before spelling Flame Alchemy attack, a pair of gloved hands after spelling Flame Alchemy attack, a pair of relaxed gloved hands, a bare left hand, and a bare right hand for holding the lighter.

Other accessories include a piece of triggered fire effect, a lighter, and the original form of the homunculus "Envy", allowing fans to recreate iconic scenes from the anime.