12 x 2.3cm Interesting Petrol Blue Vintage Buttons

A shimmery dark petrol blue colour with interesting depths and variations characteristic of this kind of vintage plastic.
There are deep concentric circles around the rims and a slight circular indention around the 2 thread holes in the middle- this adds interest, texture and light catching potential to the buttons.
They are 2.3cm and I have just 1 sheet of 12.