I illustrated this pin to look like vintage Halloween cats.
It is 1.125 x 1.375 inches (3 x 3.5 cm) so it's more brooch size (see the last photo for a sense of scale). The surface is black nickel metal with GLOW-IN-THE-DARK orange and white hard enamel. Rubber clasp.
(Modeled by Jaimee @soda_fontaine.)