Its a sticker, I got it off eBay with a couple other small stickers of her work. There's an Instagram post about them here: https://www.instagram.com/josie.io/p/BkF51vmhXZr/

That's all I really know about them.

Ooo, may I know more about the Josie Bellini's one? Never seen that, where/how did you get that? Do you have perhaps a link..?