Catching the Hogwarts Express at King's Cross Station Platform 9 3/4? Reduccio! The 3D Hogwarts Express Cufflinks are a mini replica of the magical train that takes the students of the Hogwarts School of Witchcraft and Wizardry. These Harry Potter cufflinks are crafted in 3D with enamel details to capture the iconic magical train in as much detail that such a small scale can allow. Approximately 1" x 3/8", plated base metal and enamel, round logo swivel closure. Officially licensed by Warner Bros. Entertainment Inc.