The FBC Toxic Sign is a medium-sized, rectangular warning sign with sharp, angular edges, embodying the brutalist architecture style of the game. It features a bold, black and yellow hazard stripe pattern with the letters 'FBC' and 'TOXIC' in a stark, sans-serif font, suggesting danger and authority. The sign's surface is slightly weathered, with subtle scratches and dents, indicating its exposure to the harsh environments of the game's surreal world.