I have a set of 5 vintage drapery pins.  They are plastic.  The 2 in the back, blue ones, measure about 1 1/4" across, the large green one is about 1 1/4" across, the small green one is about 3/4" across and the multicolor flower one is about 3/4" across.  The metal pins have a bit of rust on them and the large blue ones and multi color flower one has some brown staining on the back of the plastic. 

5 Drapery Pins Vintage