That's a Wrap Brooch (2021) by Hello Kitty and Erstwilder

Each piece is hand assembled, hand painted and released in limited quantities. All designs are made from layered resin. As designs are produced from original illustrations and are hand assembled, hand painted and hand finished, there may be minor differences from piece to piece, making each as unique as those who wear them. Metal components used in creating this piece include a beautiful and strong silver-plated steel brooch pin. Any earring posts, earring hooks, necklace chains and jump rings used for this piece are made from silver-plated steel.

Designs come packaged in Erstwilder gift boxes..