This is an adorable vintage large 1940's ELzac CERAMIC and lucite Bunnykins bunny rabbit " pin " . You can even spin his little tail . I put pin in quotes because although it was meant to be a pin it looks like the pin back never got attached . The upside is I don't think it was ever worn and it's in excellent condition . Other then the glaze has slight age crazing that you really can't see without flaws and magnification .( and I should have given him a little bath before I took the photos 😬
I've added cleaned up pictures to the end .
It measures 3 & 3/4"