We have a door plate ornate metal vintage Eastlake.  It measures about 5 3/8" in H x about 1 1/2" in w with the center hole opening for the door spindle being about 1/2" across.  There is actively chipping paint (it appears to be 1 layer) on it - more than likely lead based paint.  It does stick to a magnet, not brass.

Door Plate Ornate Metal Vintage Eastlake