We have a Rose Brooch Brown with Greenery Vintage item.  It is made of a thin ?plastic with fabric leaves.  It measures about 1 5/8" across x about 1 1/4" in l x about 1 1/2" in d.  I believe this was either home made or repaired as there is a glob of glue in the center back holding the pin on.....doesn't look the best but it does the job and no one sees it....