I have 7  vintage drapery pins.  They are plastic.  The set of 3 with the pink centers are about 1 1/4" across the center front (2 of the pink centers have some finish missing and 1 of the pins is a bit rusty).  The floral pins in the center of the first photo are about 1 7/8" across the center.  The 2 in the back are white, 2 different flowers, different sizes and the large one has a shine to it the smaller does not.  They are about 1 7/8" & 1 1/4" across the centers.

7 Drapery Pins Vintage