We have a Rabbit brooch, not pefect.  The paint shows a bit of wear and the clasp usually would have a "nub" to turn to engage lock on pin, the "nub is missing.  I was able to open and close it without but not as easily.  It measures about 1 5/8" in H x about 1" across x about 3/8" in D.
 

Rabbit brooch Vintage not perfect

$12.95 Regular Price
$10.36Sale Price