A giant suit was produced for the caterpillar Mothra, which allowed larger sets and details to be included. The suit was the largest monster suit that Toho had ever produced. It was built at 1/25th scale, was seven meters long, and required five to six actors inside to move it. Haruo Nakajima and Katsumi Tezuka lead members of the special effects art staff inside the suit. A hand-operated model of the caterpillar was also produced. The hand model had a more narrow, oval shape than the other models and had small legs at the bottom, a feature that other models lacked.