César was a key figure of the Nouveau Réalisme movement, which recontextualized everyday objects as art. Known for his compression of metal objects such as cars, he began experimenting with plastic and resin in the 1960s, leading to Pouce, a series based on his own thumb. The series started with a 40-centimetre thumb cast in plastic, meticulously capturing every detail. César went on to recreate it in various sizes and materials, including polyester, crystal, and—in this case—bronze.