the Imperial State Crown was modeled on one designed for Queen Victoria in 1838. Since then, it has been worn at two more coronations (Queen Elizabeth's in 1953 and King Charles' in 2023 ...

The crown can bend through 180 degrees and can actually be worn as a head ornament, with pin headers to clamp it down on the wearer’s hair. [Rehana] used a tool called svg-pcb to design the board.